Congenital Zika Syndrome

Infectious Disease MONDO:0000890 Pathograph 5 Show in embeddings browser Microcephaly

Congenital Zika syndrome (CZS) is a non-genetic malformation of cortical development caused by intrauterine infection with Zika virus (ZIKV), a mosquito-borne flavivirus. After maternal infection — most consequential for fetal neurodevelopment during the first and second trimesters — ZIKV crosses the placenta and reaches the developing fetal central nervous system, where it is neurotropic for apical and outer radial glia and other neural progenitor cells of the cortical ventricular and subventricular zones. Productive infection of these founder progenitors dysregulates the cell cycle, triggers caspase-mediated apoptosis, and activates innate antiviral signalling (including the TLR3 pathway and type I interferon responses), collectively depleting the progenitor pool and abrogating neurogenesis during the peak neurogenic window. The resulting deficit of cortical neurons produces the recognizable CZS phenotype: severe (often congenital) microcephaly with a markedly disproportionate skull, agyria/lissencephaly-like smooth cortex, intracranial (cortical and subcortical) calcifications, ventriculomegaly/hydrocephalus, and cortical thinning, frequently accompanied by ocular abnormalities, arthrogryposis, sensorineural hearing loss, seizures, and global developmental delay. CZS is the exemplar infectious (non-Mendelian) cortical malformation mechanism: its proximal cause is a defined viral exposure rather than a germline variant, but it converges on the same progenitor-depletion endpoint as genetic primary microcephaly, distinguished pathologically by a more destructive process with prominent cell death, necrosis, and calcification.

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Discussions and Knowledge Gaps

Which parts of the congenital Zika syndrome mechanism are directly supported in human fetal disease, and which remain model-dependent findings from human iPSC-derived neural progenitors, cerebral organoids, mouse embryos, non-human-primate organoids, or organotypic fetal systems?

HUMAN MODEL MISMATCH OPEN gap_czs_human_model_translatability

Attached to

pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry pathophysiology#Antiviral Innate Immune Activation pathophysiology#Viral Mitotic and Centrosome Cytopathy pathophysiology#Neural Progenitor Apoptosis and Pool Depletion pathophysiology#Impaired Neurogenesis and Congenital Cortical Malformation

The disease pathograph now conforms to the viral neural progenitor cytopathy module, but much of the causal resolution comes from experimental systems rather than longitudinal human fetal material. Human autopsy anchors viral brain invasion and destructive malformation, while iPSC-derived hNPCs, cerebral organoids, mouse embryos, and non-human-primate organoids resolve entry, TLR3/TBK1 signaling, centrosome perturbation, apoptosis, and strain adaptation. This gap prevents a single model system from being treated as complete proof of the human prenatal disease sequence.

Proposed experiments

CZS cross-model fetal-brain alignment experiment

cross-model viral cortical malformation alignment experiment

exp_czs_cross_model_fetal_alignment

Compare matched ZIKV strains across human iPSC-derived cortical organoids, hNPC/radial-glial cultures, ethically available fetal cortical tissue or organotypic slices, and susceptible in vivo models, then map viral tropism, TLR3/TBK1 signaling, centrosome perturbation, apoptosis, progenitor loss, neurogenesis, and cortical thinning against human fetal autopsy endpoints.

Model systems

Human iPSC-derived cortical organoid ZIKV model

Three-dimensional human cortical organoid system containing radial glia, neural progenitors, and early cortical neurons exposed to clinically relevant ZIKV strains.

ORGANOID namo:Organoid link

human NCBITaxon:9606

cerebral cortex UBERON:0000956

radial glial cell CL:0000681 neural progenitor cell CL:0011020

Human fetal cortical tissue benchmark

Postmortem or organotypic fetal cortical material, where ethically and legally available, used as a benchmark for viral localization, radial glial vulnerability, apoptosis, calcification, and cortical tissue architecture.

PRIMARY CELL CULTURE

human NCBITaxon:9606

cerebral cortex UBERON:0000956

radial glial cell CL:0000681 neural progenitor cell CL:0011020

Perturbations

Matched congenital ZIKV strain exposure

pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry

Expose model systems to matched congenital outbreak isolates and laboratory-passaged controls under controlled inoculum and developmental timing.

Readouts

Viral tropism and replication in radial glia and neural progenitors

pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry

viral genome replication GO:0019079 ↑ INCREASED

viral RNA quantification immunostaining single-cell RNA sequencing

Direction: POSITIVE

Innate immune and centrosome cytopathy

pathophysiology#Viral Mitotic and Centrosome Cytopathy

toll-like receptor signaling pathway GO:0002224 ↑ INCREASED centrosome cycle GO:0007098 ⚠ ABNORMAL

phospho-TBK1 localization assay centrosome immunostaining single-cell RNA sequencing

Direction: POSITIVE

Progenitor survival and cortical growth

pathophysiology#Neural Progenitor Apoptosis and Pool Depletion

apoptotic process GO:0006915 ↑ INCREASED neurogenesis GO:0022008 ↓ DECREASED

cleaved caspase-3 immunostaining progenitor and neuron marker quantification cortical thickness measurement

Direction: NEGATIVE

Controls

Mock-infected controls

Matched model systems exposed to vehicle without infectious virus.

Strain-matched heat-inactivated viral controls

Controls for innate immune stimulation not requiring productive infection.

Decision criterion

The CZS mechanism is strengthened if human organoids, fetal tissue benchmarks, and susceptible in vivo models show concordant radial-glial or progenitor tropism, TLR3/TBK1 and centrosome perturbation, apoptosis, progenitor depletion, reduced neurogenesis, and cortical thinning under matched strain and developmental timing. Major divergence would localize model-specific branches that should not be generalized to human CZS.

Would support

Would refute

pathophysiology#Viral Mitotic and Centrosome Cytopathy pathophysiology#Neural Progenitor Apoptosis and Pool Depletion

Show evidence (2 references)

PMID:27279226 SUPPORT Other

"Mouse models often fail to reproduce the severely reduced brain size and pathological alterations found in human patients21,22, likely due to significant differences in gestation time and brain development between the two species."

The paper explicitly identifies species and developmental-context differences that limit translation from mouse CZS models.

PMID:27279226 SUPPORT In Vitro

"Finally, our data using a non-human primate organoids suggested that the ZIKVBR might have experienced adaptive changes in human cells."

Supports a strain- and host-cell-context mismatch gap for translating organoid and animal findings to human congenital infection.

No approved antiviral or disease-modifying therapy exists for congenital Zika syndrome; candidate small molecules (e.g., nucleoside analogues) and TLR3-pathway modulation have shown effects only in experimental models. Which interventions, if any, can interrupt the progenitor-cytopathy cascade within the narrow prenatal therapeutic window?

KNOWLEDGE GAP OPEN gap_czs_specific_therapy

Attached to

pathophysiology#Antiviral Innate Immune Activation pathophysiology#Neural Progenitor Apoptosis and Pool Depletion

Experimental evidence (e.g., TLR3 inhibition reducing ZIKV phenotypes in organoids) suggests mechanistically rational intervention points, but no therapy has translated to human prenatal use, and the destructive, early-onset nature of the progenitor cytopathy makes the therapeutic window extremely narrow. This gap motivates prevention (vector control, avoidance of exposure in pregnancy) as the current mainstay.

⚙

Pathophysiology

Maternal-Fetal Transmission and Neurotropic Viral Entry

Following maternal ZIKV infection, the virus crosses the placental barrier and reaches the developing fetal brain, where it is neurotropic for radial glia and neural progenitor cells. Candidate entry receptors enriched on these cells — notably the TAM-family receptor tyrosine kinase AXL, which is highly expressed by human radial glia in the developing cortex — are thought to mediate or facilitate viral attachment and entry, establishing infection of the founder progenitor population during corticogenesis.

Radial glial cell CL:0000681 Neural progenitor cell CL:0011020

Viral entry into host cell GO:0046718 ↑ INCREASED Viral genome replication GO:0019079 ↑ INCREASED

Downstream

Antiviral Innate Immune Activation

Viral Mitotic and Centrosome Cytopathy

Show evidence (3 references)

PMID:26862926 SUPPORT Human Clinical

"ZIKV was found in the fetal brain tissue on reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assay, with consistent findings on electron microscopy."

Demonstrates ZIKV reaching and being present in human fetal brain tissue after maternal infection.

PMID:27038591 SUPPORT In Vitro

"we found that the candidate viral entry receptor AXL is highly expressed by human radial glial cells, astrocytes, endothelial cells, and microglia in developing human cortex and by progenitor cells in developing retina."

Identifies AXL on human radial glia as a candidate entry receptor enriched on the progenitor population ZIKV targets.

PMID:27279226 SUPPORT Model Organism

"Here we demonstrate that ZIKV(BR) infects fetuses, causing intrauterine growth restriction, including signs of microcephaly, in mice."

Provides in vivo evidence that the Brazilian ZIKV strain crosses to the fetus and produces microcephaly-like defects.

Antiviral Innate Immune Activation

ZIKV infection activates innate antiviral signalling within developing neural progenitor systems. Human cerebral organoid and neurosphere data implicate Toll-like receptor 3 (TLR3) activation and type I interferon-linked responses in perturbed neurogenesis, altered cell fate, and downstream progenitor loss; TLR3 inhibition mitigates the phenotype in experimental models.

Neural progenitor cell CL:0011020 Radial glial cell CL:0000681

Innate immune response GO:0045087 ↑ INCREASED Toll-like receptor signaling pathway GO:0002224 ↑ INCREASED Type I interferon-mediated signaling pathway GO:0060337 ↕ DYSREGULATED Defense response to virus GO:0051607 ↕ DYSREGULATED

Downstream

Neural Progenitor Apoptosis and Pool Depletion

Show evidence (2 references)

PMID:27162029 SUPPORT In Vitro

"The innate immune receptor Toll-like-Receptor 3 (TLR3) was upregulated after ZIKV infection of human organoids and mouse neurospheres and TLR3 inhibition reduced the phenotypic effects of ZIKV infection."

Implicates TLR3 innate immune activation in ZIKV-driven progenitor cytopathy, with inhibition reducing the experimental phenotype.

PMID:27162029 SUPPORT In Vitro

"Together, therefore, our findings identify a link between ZIKV-mediated TLR3 activation, perturbed cell fate, and a reduction in organoid volume reminiscent of microcephaly."

Connects ZIKV-triggered TLR3 activation to perturbed cell fate and reduced organoid volume in a human cerebral organoid model.

Viral Mitotic and Centrosome Cytopathy

ZIKV productively infects human neural progenitor cells and radial glia, releasing infectious virus and perturbing cell-cycle progression, mitotic machinery, centrosome integrity, and phospho-TBK1 localization. These mitotic and centrosome defects impair proliferative progenitor divisions and converge on the same neural progenitor centrosome/spindle dysfunction module used by genetic cortical malformation entries.

Neural progenitor cell CL:0011020 Radial glial cell CL:0000681

Mitotic cell cycle GO:0000278 ↕ DYSREGULATED Cell cycle GO:0007049 ↕ DYSREGULATED Mitotic spindle organization GO:0007052 ↕ DYSREGULATED Centrosome cycle GO:0007098 ⚠ ABNORMAL

Downstream

Neural Progenitor Apoptosis and Pool Depletion

Show evidence (3 references)

PMID:26952870 SUPPORT In Vitro

"ZIKV infection increases cell death and dysregulates cell-cycle progression, resulting in attenuated hNPC growth."

Links infection to cell-cycle dysregulation and attenuated progenitor growth.

PMID:27568284 SUPPORT In Vitro

"ZIKV infection of NES cells and RGCs causes centrosomal depletion and mitochondrial sequestration of phospho-TBK1 during mitosis."

Supports mitotic centrosome/TBK1 cytopathy in infected human neuroepithelial stem cells and radial glia.

PMID:28132835 SUPPORT In Vitro

"The main phenotypic effect was premature differentiation of neural progenitors associated with centrosome perturbation, even during early stages of infection, leading to progenitor depletion, disruption of the VZ, impaired neurogenesis, and cortical thinning."

Human brain organoids show ZIKV-associated centrosome perturbation leading to progenitor depletion and cortical thinning.

Neural Progenitor Apoptosis and Pool Depletion

Innate antiviral activation, viral replication, cell-cycle disruption, and mitotic/centrosome stress converge on caspase-mediated apoptosis, autophagy, premature differentiation, and reduced viability of neural progenitors and radial glia. The founder progenitor pool is depleted, leaving too few neuron-generating cells for normal cortical expansion.

Neural progenitor cell CL:0011020 Radial glial cell CL:0000681

Apoptotic process GO:0006915 ↑ INCREASED Neurogenesis GO:0022008 ↓ DECREASED Cell population proliferation GO:0008283 ↓ DECREASED

Downstream

Impaired Neurogenesis and Congenital Cortical Malformation

Show evidence (3 references)

PMID:27064148 SUPPORT In Vitro

"we showed that ZIKV targets human brain cells, reducing their viability and growth as neurospheres and brain organoids. These results suggest that ZIKV abrogates neurogenesis during human brain development."

Demonstrates that ZIKV reduces human neural progenitor viability/growth and abrogates neurogenesis.

PMID:26952870 SUPPORT In Vitro

"ZIKV infection increases cell death and dysregulates cell-cycle progression, resulting in attenuated hNPC growth."

Connects infection-driven cell death and cell-cycle dysregulation to reduced progenitor growth.

PMID:27279226 SUPPORT Model Organism

"ZIKV(BR) crosses the placenta and causes microcephaly by targeting cortical progenitor cells, inducing cell death by apoptosis and autophagy, and impairing neurodevelopment."

Establishes apoptosis and autophagy of cortical progenitors as in vivo mechanisms of ZIKV-induced microcephaly.

Impaired Neurogenesis and Congenital Cortical Malformation

Depletion of the cortical progenitor pool and impaired neurogenesis reduce the complement of cortical neurons, producing severe microcephaly with a disproportionately small brain. Unlike many genetic microcephalies, the CZS cortex shows a more destructive pathology, with near-complete agyria (lissencephaly-like smoothing), multifocal cortical and subcortical calcifications, hydrocephalus/ventriculomegaly, and cortical displacement, reflecting prominent cell death during development.

Neural progenitor cell CL:0011020

Neurogenesis GO:0022008 ↓ DECREASED Cerebral cortex development GO:0021987 ⚠ ABNORMAL

Show evidence (2 references)

PMID:26862926 SUPPORT Human Clinical

"Micrencephaly (an abnormally small brain) was observed, with almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter, with associated cortical displacement and mild focal inflammation."

Human fetal autopsy documenting the destructive cortical malformation phenotype of CZS.

PMID:27179424 SUPPORT Model Organism

"ZIKV infection leads to cell-cycle arrest, apoptosis, and inhibition of NPC differentiation, resulting in cortical thinning and microcephaly."

In vivo recapitulation of cortical thinning and microcephaly as the developmental endpoint.

⬡

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.

●

Phenotypes

Head and Neck 1

Microcephaly Microcephaly HP:0000252

Show evidence (1 reference)

PMID:26862926 SUPPORT Human Clinical

Documents micrencephaly (abnormally small brain) on human fetal autopsy.

Nervous System 1

Hydrocephalus Hydrocephalus HP:0000238

Show evidence (1 reference)

PMID:26862926 SUPPORT Human Clinical

"almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications"

Records hydrocephalus in the affected fetal brain.

Other 2

Lissencephaly Lissencephaly HP:0001339

Show evidence (1 reference)

PMID:26862926 SUPPORT Human Clinical

"almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter"

Records almost complete agyria (lissencephaly-like) in the affected fetal brain.

Intracranial Calcification Cerebral calcification HP:0002514

Show evidence (1 reference)

PMID:26862926 SUPPORT Human Clinical

"multifocal dystrophic calcifications in the cortex and subcortical white matter"

Documents the characteristic cortical and subcortical calcifications of CZS.

💊

Medical Actions

Supportive Care

Action: Supportive Care NCIT:C15747

There is no specific antiviral therapy for congenital Zika syndrome. Management is supportive and multidisciplinary, addressing feeding difficulties, seizures, spasticity, and developmental needs.

Physical and Developmental Therapy

Action: physical therapy MAXO:0000011

Early rehabilitative and developmental therapy to support motor function and mitigate the consequences of arthrogryposis and spasticity.

{ }

Source YAML

click to show

name: Congenital Zika Syndrome
creation_date: "2026-06-10T12:00:00Z"
category: Infectious Disease
disease_term:
  preferred_term: Zika virus congenital syndrome
  term:
    id: MONDO:0000890
    label: Zika virus congenital syndrome
parents:
- Microcephaly
description: >-
  Congenital Zika syndrome (CZS) is a non-genetic malformation of cortical
  development caused by intrauterine infection with Zika virus (ZIKV), a
  mosquito-borne flavivirus. After maternal infection — most consequential for
  fetal neurodevelopment during the first and second trimesters — ZIKV crosses
  the placenta and reaches the developing fetal central nervous system, where it
  is neurotropic for apical and outer radial glia and other neural progenitor
  cells of the cortical ventricular and subventricular zones. Productive
  infection of these founder progenitors dysregulates the cell cycle, triggers
  caspase-mediated apoptosis, and activates innate antiviral signalling
  (including the TLR3 pathway and type I interferon responses), collectively
  depleting the progenitor pool and abrogating neurogenesis during the peak
  neurogenic window. The resulting deficit of cortical neurons produces the
  recognizable CZS phenotype: severe (often congenital) microcephaly with a
  markedly disproportionate skull, agyria/lissencephaly-like smooth cortex, intracranial
  (cortical and subcortical) calcifications, ventriculomegaly/hydrocephalus,
  and cortical thinning, frequently accompanied by ocular abnormalities,
  arthrogryposis, sensorineural hearing loss, seizures, and global
  developmental delay. CZS is the exemplar infectious (non-Mendelian) cortical
  malformation mechanism: its proximal cause is a defined viral exposure rather
  than a germline variant, but it converges on the same progenitor-depletion
  endpoint as genetic primary microcephaly, distinguished pathologically by a
  more destructive process with prominent cell death, necrosis, and
  calcification.
pathophysiology:
- name: Maternal-Fetal Transmission and Neurotropic Viral Entry
  description: >-
    Following maternal ZIKV infection, the virus crosses the placental barrier
    and reaches the developing fetal brain, where it is neurotropic for radial
    glia and neural progenitor cells. Candidate entry receptors enriched on
    these cells — notably the TAM-family receptor tyrosine kinase AXL, which is
    highly expressed by human radial glia in the developing cortex — are thought
    to mediate or facilitate viral attachment and entry, establishing infection
    of the founder progenitor population during corticogenesis.
  conforms_to: viral_neural_progenitor_cytopathy#Fetal Brain Viral Exposure and Progenitor Infection
  cell_types:
  - preferred_term: Radial glial cell
    term:
      id: CL:0000681
      label: radial glial cell
  - preferred_term: Neural progenitor cell
    term:
      id: CL:0011020
      label: neural progenitor cell
  biological_processes:
  - preferred_term: Viral entry into host cell
    term:
      id: GO:0046718
      label: symbiont entry into host cell
    modifier: INCREASED
  - preferred_term: Viral genome replication
    term:
      id: GO:0019079
      label: viral genome replication
    modifier: INCREASED
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "ZIKV was found in the fetal brain tissue on reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assay, with consistent findings on electron microscopy."
    explanation: Demonstrates ZIKV reaching and being present in human fetal brain tissue after maternal infection.
  - reference: PMID:27038591
    reference_title: "Expression Analysis Highlights AXL as a Candidate Zika Virus Entry Receptor in Neural Stem Cells."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "we found that the candidate viral entry receptor AXL is highly expressed by human radial glial cells, astrocytes, endothelial cells, and microglia in developing human cortex and by progenitor cells in developing retina."
    explanation: Identifies AXL on human radial glia as a candidate entry receptor enriched on the progenitor population ZIKV targets.
  - reference: PMID:27279226
    reference_title: "The Brazilian Zika virus strain causes birth defects in experimental models."
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Here we demonstrate that ZIKV(BR) infects fetuses, causing intrauterine growth restriction, including signs of microcephaly, in mice."
    explanation: Provides in vivo evidence that the Brazilian ZIKV strain crosses to the fetus and produces microcephaly-like defects.
  downstream:
  - target: Antiviral Innate Immune Activation
  - target: Viral Mitotic and Centrosome Cytopathy
- name: Antiviral Innate Immune Activation
  description: >-
    ZIKV infection activates innate antiviral signalling within developing
    neural progenitor systems. Human cerebral organoid and neurosphere data
    implicate Toll-like receptor 3 (TLR3) activation and type I interferon-linked
    responses in perturbed neurogenesis, altered cell fate, and downstream
    progenitor loss; TLR3 inhibition mitigates the phenotype in experimental
    models.
  conforms_to: viral_neural_progenitor_cytopathy#Antiviral Innate Immune Activation
  cell_types:
  - preferred_term: Neural progenitor cell
    term:
      id: CL:0011020
      label: neural progenitor cell
  - preferred_term: Radial glial cell
    term:
      id: CL:0000681
      label: radial glial cell
  biological_processes:
  - preferred_term: Innate immune response
    term:
      id: GO:0045087
      label: innate immune response
    modifier: INCREASED
  - preferred_term: Toll-like receptor signaling pathway
    term:
      id: GO:0002224
      label: toll-like receptor signaling pathway
    modifier: INCREASED
  - preferred_term: Type I interferon-mediated signaling pathway
    term:
      id: GO:0060337
      label: type I interferon-mediated signaling pathway
    modifier: DYSREGULATED
  - preferred_term: Defense response to virus
    term:
      id: GO:0051607
      label: defense response to virus
    modifier: DYSREGULATED
  evidence:
  - reference: PMID:27162029
    reference_title: "Zika Virus Depletes Neural Progenitors in Human Cerebral Organoids through Activation of the Innate Immune Receptor TLR3."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "The innate immune receptor Toll-like-Receptor 3 (TLR3) was upregulated after ZIKV infection of human organoids and mouse neurospheres and TLR3 inhibition reduced the phenotypic effects of ZIKV infection."
    explanation: Implicates TLR3 innate immune activation in ZIKV-driven progenitor cytopathy, with inhibition reducing the experimental phenotype.
  - reference: PMID:27162029
    reference_title: "Zika Virus Depletes Neural Progenitors in Human Cerebral Organoids through Activation of the Innate Immune Receptor TLR3."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "Together, therefore, our findings identify a link between ZIKV-mediated TLR3 activation, perturbed cell fate, and a reduction in organoid volume reminiscent of microcephaly."
    explanation: Connects ZIKV-triggered TLR3 activation to perturbed cell fate and reduced organoid volume in a human cerebral organoid model.
  downstream:
  - target: Neural Progenitor Apoptosis and Pool Depletion
- name: Viral Mitotic and Centrosome Cytopathy
  description: >-
    ZIKV productively infects human neural progenitor cells and radial glia,
    releasing infectious virus and perturbing cell-cycle progression, mitotic
    machinery, centrosome integrity, and phospho-TBK1 localization. These
    mitotic and centrosome defects impair proliferative progenitor divisions and
    converge on the same neural progenitor centrosome/spindle dysfunction module
    used by genetic cortical malformation entries.
  conforms_to: viral_neural_progenitor_cytopathy#Viral Mitotic and Centrosome Cytopathy
  cell_types:
  - preferred_term: Neural progenitor cell
    term:
      id: CL:0011020
      label: neural progenitor cell
  - preferred_term: Radial glial cell
    term:
      id: CL:0000681
      label: radial glial cell
  biological_processes:
  - preferred_term: Mitotic cell cycle
    term:
      id: GO:0000278
      label: mitotic cell cycle
    modifier: DYSREGULATED
  - preferred_term: Cell cycle
    term:
      id: GO:0007049
      label: cell cycle
    modifier: DYSREGULATED
  - preferred_term: Mitotic spindle organization
    term:
      id: GO:0007052
      label: mitotic spindle organization
    modifier: DYSREGULATED
  - preferred_term: Centrosome cycle
    term:
      id: GO:0007098
      label: centrosome cycle
    modifier: ABNORMAL
  evidence:
  - reference: PMID:26952870
    reference_title: "Zika Virus Infects Human Cortical Neural Progenitors and Attenuates Their Growth."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "ZIKV infection increases cell death and dysregulates cell-cycle progression, resulting in attenuated hNPC growth."
    explanation: Links infection to cell-cycle dysregulation and attenuated progenitor growth.
  - reference: PMID:27568284
    reference_title: "Zika Virus Disrupts Phospho-TBK1 Localization and Mitosis in Human Neuroepithelial Stem Cells and Radial Glia."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "ZIKV infection of NES cells and RGCs causes centrosomal depletion and mitochondrial sequestration of phospho-TBK1 during mitosis."
    explanation: Supports mitotic centrosome/TBK1 cytopathy in infected human neuroepithelial stem cells and radial glia.
  - reference: PMID:28132835
    reference_title: "Recent Zika Virus Isolates Induce Premature Differentiation of Neural Progenitors in Human Brain Organoids."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "The main phenotypic effect was premature differentiation of neural progenitors associated with centrosome perturbation, even during early stages of infection, leading to progenitor depletion, disruption of the VZ, impaired neurogenesis, and cortical thinning."
    explanation: Human brain organoids show ZIKV-associated centrosome perturbation leading to progenitor depletion and cortical thinning.
  downstream:
  - target: Neural Progenitor Apoptosis and Pool Depletion
- name: Neural Progenitor Apoptosis and Pool Depletion
  description: >-
    Innate antiviral activation, viral replication, cell-cycle disruption, and
    mitotic/centrosome stress converge on caspase-mediated apoptosis, autophagy,
    premature differentiation, and reduced viability of neural progenitors and
    radial glia. The founder progenitor pool is depleted, leaving too few
    neuron-generating cells for normal cortical expansion.
  conforms_to: viral_neural_progenitor_cytopathy#Neural Progenitor Apoptosis and Pool Depletion
  cell_types:
  - preferred_term: Neural progenitor cell
    term:
      id: CL:0011020
      label: neural progenitor cell
  - preferred_term: Radial glial cell
    term:
      id: CL:0000681
      label: radial glial cell
  biological_processes:
  - preferred_term: Apoptotic process
    term:
      id: GO:0006915
      label: apoptotic process
    modifier: INCREASED
  - preferred_term: Neurogenesis
    term:
      id: GO:0022008
      label: neurogenesis
    modifier: DECREASED
  - preferred_term: Cell population proliferation
    term:
      id: GO:0008283
      label: cell population proliferation
    modifier: DECREASED
  evidence:
  - reference: PMID:27064148
    reference_title: "Zika virus impairs growth in human neurospheres and brain organoids."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "we showed that ZIKV targets human brain cells, reducing their viability and growth as neurospheres and brain organoids. These results suggest that ZIKV abrogates neurogenesis during human brain development."
    explanation: Demonstrates that ZIKV reduces human neural progenitor viability/growth and abrogates neurogenesis.
  - reference: PMID:26952870
    reference_title: "Zika Virus Infects Human Cortical Neural Progenitors and Attenuates Their Growth."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "ZIKV infection increases cell death and dysregulates cell-cycle progression, resulting in attenuated hNPC growth."
    explanation: Connects infection-driven cell death and cell-cycle dysregulation to reduced progenitor growth.
  - reference: PMID:27279226
    reference_title: "The Brazilian Zika virus strain causes birth defects in experimental models."
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "ZIKV(BR) crosses the placenta and causes microcephaly by targeting cortical progenitor cells, inducing cell death by apoptosis and autophagy, and impairing neurodevelopment."
    explanation: Establishes apoptosis and autophagy of cortical progenitors as in vivo mechanisms of ZIKV-induced microcephaly.
  downstream:
  - target: Impaired Neurogenesis and Congenital Cortical Malformation
- name: Impaired Neurogenesis and Congenital Cortical Malformation
  description: >-
    Depletion of the cortical progenitor pool and impaired neurogenesis reduce
    the complement of cortical neurons, producing severe microcephaly with a
    disproportionately small brain. Unlike many genetic microcephalies, the CZS
    cortex shows a more destructive pathology, with near-complete agyria
    (lissencephaly-like smoothing), multifocal cortical and subcortical
    calcifications, hydrocephalus/ventriculomegaly, and cortical displacement,
    reflecting prominent cell death during development.
  conforms_to: viral_neural_progenitor_cytopathy#Impaired Neurogenesis and Congenital Cortical Malformation
  cell_types:
  - preferred_term: Neural progenitor cell
    term:
      id: CL:0011020
      label: neural progenitor cell
  biological_processes:
  - preferred_term: Neurogenesis
    term:
      id: GO:0022008
      label: neurogenesis
    modifier: DECREASED
  - preferred_term: Cerebral cortex development
    term:
      id: GO:0021987
      label: cerebral cortex development
    modifier: ABNORMAL
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Micrencephaly (an abnormally small brain) was observed, with almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter, with associated cortical displacement and mild focal inflammation."
    explanation: Human fetal autopsy documenting the destructive cortical malformation phenotype of CZS.
  - reference: PMID:27179424
    reference_title: "Zika Virus Disrupts Neural Progenitor Development and Leads to Microcephaly in Mice."
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "ZIKV infection leads to cell-cycle arrest, apoptosis, and inhibition of NPC differentiation, resulting in cortical thinning and microcephaly."
    explanation: In vivo recapitulation of cortical thinning and microcephaly as the developmental endpoint.
phenotypes:
- category: Neurologic
  name: Microcephaly
  diagnostic: true
  description: >-
    Severe, frequently congenital microcephaly with a markedly disproportionate
    skull is the hallmark feature of congenital Zika syndrome.
  phenotype_term:
    preferred_term: Microcephaly
    term:
      id: HP:0000252
      label: Microcephaly
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Micrencephaly (an abnormally small brain) was observed, with almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter, with associated cortical displacement and mild focal inflammation."
    explanation: Documents micrencephaly (abnormally small brain) on human fetal autopsy.
- category: Neurologic
  name: Lissencephaly
  description: >-
    Near-complete agyria (a lissencephaly-like smooth cortex) reflects the
    severe disruption of cortical development.
  phenotype_term:
    preferred_term: Lissencephaly
    term:
      id: HP:0001339
      label: Lissencephaly
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter"
    explanation: Records almost complete agyria (lissencephaly-like) in the affected fetal brain.
- category: Neurologic
  name: Intracranial Calcification
  description: >-
    Multifocal calcifications in the cortex and subcortical white matter are a
    characteristic neuroimaging and pathological feature of CZS.
  phenotype_term:
    preferred_term: Cerebral calcification
    term:
      id: HP:0002514
      label: Cerebral calcification
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "multifocal dystrophic calcifications in the cortex and subcortical white matter"
    explanation: Documents the characteristic cortical and subcortical calcifications of CZS.
- category: Neurologic
  name: Hydrocephalus
  description: >-
    Hydrocephalus/ventriculomegaly accompanies the cortical malformation in
    congenital Zika syndrome.
  phenotype_term:
    preferred_term: Hydrocephalus
    term:
      id: HP:0000238
      label: Hydrocephalus
  evidence:
  - reference: PMID:26862926
    reference_title: "Zika Virus Associated with Microcephaly."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications"
    explanation: Records hydrocephalus in the affected fetal brain.
treatments:
- name: Supportive Care
  description: >-
    There is no specific antiviral therapy for congenital Zika syndrome.
    Management is supportive and multidisciplinary, addressing feeding
    difficulties, seizures, spasticity, and developmental needs.
  treatment_term:
    preferred_term: Supportive Care
    term:
      id: NCIT:C15747
      label: Supportive Care
- name: Physical and Developmental Therapy
  description: >-
    Early rehabilitative and developmental therapy to support motor function
    and mitigate the consequences of arthrogryposis and spasticity.
  treatment_term:
    preferred_term: physical therapy
    term:
      id: MAXO:0000011
      label: physical therapy
discussions:
- discussion_id: gap_czs_human_model_translatability
  prompt: >-
    Which parts of the congenital Zika syndrome mechanism are directly supported
    in human fetal disease, and which remain model-dependent findings from human
    iPSC-derived neural progenitors, cerebral organoids, mouse embryos,
    non-human-primate organoids, or organotypic fetal systems?
  kind: HUMAN_MODEL_MISMATCH
  status: OPEN
  attaches_to:
  - pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry
  - pathophysiology#Antiviral Innate Immune Activation
  - pathophysiology#Viral Mitotic and Centrosome Cytopathy
  - pathophysiology#Neural Progenitor Apoptosis and Pool Depletion
  - pathophysiology#Impaired Neurogenesis and Congenital Cortical Malformation
  rationale: >-
    The disease pathograph now conforms to the viral neural progenitor cytopathy
    module, but much of the causal resolution comes from experimental systems
    rather than longitudinal human fetal material. Human autopsy anchors viral
    brain invasion and destructive malformation, while iPSC-derived hNPCs,
    cerebral organoids, mouse embryos, and non-human-primate organoids resolve
    entry, TLR3/TBK1 signaling, centrosome perturbation, apoptosis, and strain
    adaptation. This gap prevents a single model system from being treated as
    complete proof of the human prenatal disease sequence.
  evidence:
  - reference: PMID:27279226
    reference_title: "The Brazilian Zika virus strain causes birth defects in experimental models."
    supports: SUPPORT
    evidence_source: OTHER
    snippet: >-
      Mouse models often fail to reproduce the severely reduced brain size and
      pathological alterations found in human patients21,22, likely due to
      significant differences in gestation time and brain development between
      the two species.
    explanation: >-
      The paper explicitly identifies species and developmental-context
      differences that limit translation from mouse CZS models.
  - reference: PMID:27279226
    reference_title: "The Brazilian Zika virus strain causes birth defects in experimental models."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: >-
      Finally, our data using a non-human primate organoids suggested that the
      ZIKVBR might have experienced adaptive changes in human cells.
    explanation: >-
      Supports a strain- and host-cell-context mismatch gap for translating
      organoid and animal findings to human congenital infection.
  proposed_experiments:
  - experiment_id: exp_czs_cross_model_fetal_alignment
    name: CZS cross-model fetal-brain alignment experiment
    description: >-
      Compare matched ZIKV strains across human iPSC-derived cortical organoids,
      hNPC/radial-glial cultures, ethically available fetal cortical tissue or
      organotypic slices, and susceptible in vivo models, then map viral tropism,
      TLR3/TBK1 signaling, centrosome perturbation, apoptosis, progenitor loss,
      neurogenesis, and cortical thinning against human fetal autopsy endpoints.
    experiment_type:
      preferred_term: cross-model viral cortical malformation alignment experiment
    model_systems:
    - name: Human iPSC-derived cortical organoid ZIKV model
      description: >-
        Three-dimensional human cortical organoid system containing radial glia,
        neural progenitors, and early cortical neurons exposed to clinically
        relevant ZIKV strains.
      experimental_model_type: ORGANOID
      namo_type: namo:Organoid
      organism:
        preferred_term: human
        term:
          id: NCBITaxon:9606
          label: Homo sapiens
      tissue_term:
        preferred_term: cerebral cortex
        term:
          id: UBERON:0000956
          label: cerebral cortex
      cell_types:
      - preferred_term: radial glial cell
        term:
          id: CL:0000681
          label: radial glial cell
      - preferred_term: neural progenitor cell
        term:
          id: CL:0011020
          label: neural progenitor cell
      conditions:
      - congenital Zika syndrome
      - prenatal viral neural progenitor infection
      cell_source: Human induced pluripotent stem cells
      culture_system: Three-dimensional cortical organoid with controlled ZIKV exposure
    - name: Human fetal cortical tissue benchmark
      description: >-
        Postmortem or organotypic fetal cortical material, where ethically and
        legally available, used as a benchmark for viral localization, radial
        glial vulnerability, apoptosis, calcification, and cortical tissue
        architecture.
      experimental_model_type: PRIMARY_CELL_CULTURE
      organism:
        preferred_term: human
        term:
          id: NCBITaxon:9606
          label: Homo sapiens
      tissue_term:
        preferred_term: cerebral cortex
        term:
          id: UBERON:0000956
          label: cerebral cortex
      cell_types:
      - preferred_term: radial glial cell
        term:
          id: CL:0000681
          label: radial glial cell
      - preferred_term: neural progenitor cell
        term:
          id: CL:0011020
          label: neural progenitor cell
      conditions:
      - congenital Zika syndrome
      cell_source: Human fetal cortical tissue
      culture_system: Fetal cortical tissue benchmark or organotypic slice where available
    perturbations:
    - name: Matched congenital ZIKV strain exposure
      target: pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry
      description: >-
        Expose model systems to matched congenital outbreak isolates and
        laboratory-passaged controls under controlled inoculum and developmental
        timing.
    readouts:
    - name: Viral tropism and replication in radial glia and neural progenitors
      target: pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry
      biological_processes:
      - preferred_term: viral genome replication
        term:
          id: GO:0019079
          label: viral genome replication
        modifier: INCREASED
      assays:
      - preferred_term: viral RNA quantification
      - preferred_term: immunostaining
      - preferred_term: single-cell RNA sequencing
      direction: POSITIVE
    - name: Innate immune and centrosome cytopathy
      target: pathophysiology#Viral Mitotic and Centrosome Cytopathy
      biological_processes:
      - preferred_term: toll-like receptor signaling pathway
        term:
          id: GO:0002224
          label: toll-like receptor signaling pathway
        modifier: INCREASED
      - preferred_term: centrosome cycle
        term:
          id: GO:0007098
          label: centrosome cycle
        modifier: ABNORMAL
      assays:
      - preferred_term: phospho-TBK1 localization assay
      - preferred_term: centrosome immunostaining
      - preferred_term: single-cell RNA sequencing
      direction: POSITIVE
    - name: Progenitor survival and cortical growth
      target: pathophysiology#Neural Progenitor Apoptosis and Pool Depletion
      biological_processes:
      - preferred_term: apoptotic process
        term:
          id: GO:0006915
          label: apoptotic process
        modifier: INCREASED
      - preferred_term: neurogenesis
        term:
          id: GO:0022008
          label: neurogenesis
        modifier: DECREASED
      assays:
      - preferred_term: cleaved caspase-3 immunostaining
      - preferred_term: progenitor and neuron marker quantification
      - preferred_term: cortical thickness measurement
      direction: NEGATIVE
    controls:
    - name: Mock-infected controls
      description: Matched model systems exposed to vehicle without infectious virus.
    - name: Strain-matched heat-inactivated viral controls
      description: Controls for innate immune stimulation not requiring productive infection.
    decision_criterion: >-
      The CZS mechanism is strengthened if human organoids, fetal tissue
      benchmarks, and susceptible in vivo models show concordant radial-glial or
      progenitor tropism, TLR3/TBK1 and centrosome perturbation, apoptosis,
      progenitor depletion, reduced neurogenesis, and cortical thinning under
      matched strain and developmental timing. Major divergence would localize
      model-specific branches that should not be generalized to human CZS.
    would_support:
    - pathophysiology#Maternal-Fetal Transmission and Neurotropic Viral Entry
    - pathophysiology#Antiviral Innate Immune Activation
    - pathophysiology#Viral Mitotic and Centrosome Cytopathy
    - pathophysiology#Neural Progenitor Apoptosis and Pool Depletion
    - pathophysiology#Impaired Neurogenesis and Congenital Cortical Malformation
    would_refute:
    - pathophysiology#Viral Mitotic and Centrosome Cytopathy
    - pathophysiology#Neural Progenitor Apoptosis and Pool Depletion
- discussion_id: gap_czs_specific_therapy
  prompt: >-
    No approved antiviral or disease-modifying therapy exists for congenital
    Zika syndrome; candidate small molecules (e.g., nucleoside analogues) and
    TLR3-pathway modulation have shown effects only in experimental models.
    Which interventions, if any, can interrupt the progenitor-cytopathy cascade
    within the narrow prenatal therapeutic window?
  kind: KNOWLEDGE_GAP
  status: OPEN
  attaches_to:
  - pathophysiology#Antiviral Innate Immune Activation
  - pathophysiology#Neural Progenitor Apoptosis and Pool Depletion
  rationale: >-
    Experimental evidence (e.g., TLR3 inhibition reducing ZIKV phenotypes in
    organoids) suggests mechanistically rational intervention points, but no
    therapy has translated to human prenatal use, and the destructive,
    early-onset nature of the progenitor cytopathy makes the therapeutic window
    extremely narrow. This gap motivates prevention (vector control, avoidance
    of exposure in pregnancy) as the current mainstay.

📚

References & Deep Research

Deep Research

Falcon ▸

1. Disease Information

Edison Scientific Literature 53 citations 2026-06-11T18:33:05.839962

1. Disease Information

1.1 Concise overview

Congenital Zika syndrome (CZS) is a specific pattern of congenital anomalies and long-term neurodevelopmental disabilities caused by vertical (mother-to-child) transmission of Zika virus (ZIKV) during pregnancy, with the central nervous system (CNS) as the primary target and frequent multisystem involvement (ocular, musculoskeletal, feeding/swallowing, and other neurologic comorbidities). (martelli2024clinicalspectrumof pages 1-2, crisantolopez2023congenitalzikasyndrome pages 1-2)

1.2 Key identifiers (ontology/classification)

ICD-11: Congenital Zika virus infection KA62.0 (explicitly stated as the ICD-11 classification in a 2024 Brazil-focused clinical spectrum update). Publication date: 2024-07; URL: https://doi.org/10.1590/0037-8682-0153-2024 (martelli2024clinicalspectrumof pages 2-3)
MeSH (related concept): Zika Virus Infection (MeSH concept id D000071243) appears in ClinicalTrials.gov structured metadata (not specific to congenital infection, but relevant controlled vocabulary). (NCT03110770 chunk 4)
MONDO ID / ICD-10 / Orphanet / OMIM / MeSH for “Congenital Zika Syndrome”: Not available from the retrieved full-text evidence in this run; only ICD-11 KA62.0 was explicitly reported. (martelli2024clinicalspectrumof pages 2-3, crisantolopez2023congenitalzikasyndrome pages 8-10)

1.3 Common synonyms / alternative names

“Congenital Zika syndrome (CZS)” (martelli2024clinicalspectrumof pages 1-2, crisantolopez2023congenitalzikasyndrome pages 1-2)
“Congenital Zika virus infection” (ICD-11 KA62.0 term; also used as a primary label in the 2024 Brazil review) (martelli2024clinicalspectrumof pages 2-3)
“Zika-related microcephaly” is frequently used to refer to severe CZS presentations in cohort literature. (mirandafilho2025characterizationof843 pages 2-3)

1.4 Evidence provenance (individual patients vs aggregated)

Evidence in this report is derived from both (i) aggregated resources (systematic reviews, meta-analyses, surveillance reviews) and (ii) primary cohorts (prospective cohorts, pooled individual-participant data analyses, caregiver studies using validated scales). (mirandafilho2025characterizationof843 pages 2-3, rabe2025areviewof pages 4-5, melo2023congenitalzikasyndrome pages 11-12)

2. Etiology

2.1 Disease causal factors

Primary cause: In utero ZIKV infection (vertical transmission), which can occur even when maternal infection is asymptomatic; congenital manifestations arise from placental infection and fetal neurotropism with injury to neural progenitors and neurodevelopmental disruption. (crisantolopez2023congenitalzikasyndrome pages 4-5, wong2025zikavirusand pages 3-5)

2.2 Risk factors

Gestational timing: Earlier maternal infection increases risk of adverse outcomes. A matched cohort study reported that 44% of pregnancies with first-trimester maternal infection had at least one adverse child event, and first-trimester infection had OR 11.2 (95% CI 3.6–35.0) for adverse outcomes vs third trimester. Publication date: 2025-01; URL: https://doi.org/10.1542/peds.2024-067552 (venancio2025earlyandlongterm pages 1-3)
Population-level risk of congenital outcomes among infected pregnancies: A large systematic review/meta-analysis estimated CZS proportion 4.65% (95% CI 3.38–6.67%) among ZIKV-infected pregnancies. Publication date: 2026-02; URL: https://doi.org/10.1038/s44360-025-00051-4 (mccain2026asystematicreview pages 1-2)

2.3 Protective factors

Evidence for protective factors is limited and heterogeneous. In one longitudinal cohort of normocephalic preschool children in Colombia (not restricted to CZS cases), daycare/school attendance was associated with a lower risk of neurodevelopmental delay, while prenatal ZIKV exposure was not significantly associated with delay in that cohort; this represents a social/environmental protective association rather than biological protection. (shah2024analysisofcongenital pages 13-15)

2.4 Gene–environment interactions (GxE)

A key hypothesized interaction is prior flavivirus immunity and antibody-dependent enhancement (ADE) mechanisms at the maternal–fetal interface, which may facilitate placental infection/transfer via Fcγ receptor pathways (conceptualized in placental-interface reviews). (wong2025zikavirusand pages 2-3)

3. Phenotypes (clinical spectrum)

3.1 Core phenotype summary (current understanding)

CZS is defined by a recognizable phenotype including severe/disproportionate microcephaly, characteristic neuroimaging abnormalities (calcifications, ventriculomegaly, cortical atrophy/malformations), ocular lesions (retinal/optic nerve), congenital contractures (arthrogryposis/clubfoot), and frequent neurologic comorbidities such as epilepsy and dysphagia. (martelli2024clinicalspectrumof pages 1-2, martelli2024clinicalspectrumof pages 2-3)

3.2 Quantitative phenotype frequencies and statistics (selected recent syntheses)

A consolidated phenotype-frequency table with suggested HPO terms and quantitative ranges is provided below.

Domain	Specific phenotype (suggested HPO term)	Quantitative estimate(s)	Population / study type	Notes	Supporting citation IDs
CNS	Microcephaly (HP:0000252)	~4% absolute risk of microcephaly after confirmed maternal ZIKV infection; baseline pre-epidemic microcephaly ~2.0/10,000 newborns	Brazil meta-analysis/review summarized in 2024 update	Signature phenotype; risk estimate refers to infected pregnancies/offspring follow-up	(martelli2024clinicalspectrumof pages 1-2)
CNS	Severe microcephaly (HP:0011451)	384/601 (63.9%) among children with microcephaly at birth; moderate 217/601 (36.1%)	IPD meta-analysis of 12 Brazilian cohorts, n=843 children with Zika-related microcephaly	Captures severity distribution among those already affected	(mirandafilho2025characterizationof843 pages 2-3)
CNS	Postnatal microcephaly (HP:0000252)	172/843 (20.4%)	IPD meta-analysis of 12 Brazilian cohorts	Highlights progression after birth in some exposed infants	(mirandafilho2025characterizationof843 pages 2-3)
Neuroimaging	Intracranial calcifications (HP:0002514)	~80% across pooled Brazilian cohorts; 94% in systematic clinicopathologic review	IPD meta-analysis; systematic review of Brazilian outbreak cohorts	One of the most consistent structural markers of severe CZS	(mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15)
Neuroimaging	Ventriculomegaly (HP:0002119)	~80% across pooled cohorts; 89% in systematic clinicopathologic review	IPD meta-analysis; systematic review	Often co-occurs with calcifications and cortical atrophy	(mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15)
Neuroimaging	Cortical atrophy / reduced cerebral parenchyma (HP:0007373, HP:0002059)	~50% cortical atrophy/developmental disorders across pooled cohorts; reduced cerebral parenchyma 86%; malformation of cortical development/lack of gyri 78%	IPD meta-analysis; systematic review	Marks severe prenatal brain disruption	(mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15)
CNS	Neurological alteration of any type	18.7%	Zika Brazilian Cohorts pooled pregnancy/child follow-up	Broader than microcephaly alone	(martelli2024clinicalspectrumof pages 3-4)
CNS	Any abnormality after antenatal exposure	24.7% had ≥1 alteration	Zika Brazilian Cohorts pooled pregnancy/child follow-up	Includes isolated abnormalities; not restricted to classic CZS	(martelli2024clinicalspectrumof pages 3-4)
CNS	Epilepsy / seizures (HP:0001250)	37.7%–71.4% in reviewed cohorts; 71.4% cumulative incidence within 2 years in one microcephaly cohort; 30%–80% across 12-cohort IPD; 91% in clinicopathologic review	Brazil cohorts, systematic reviews, IPD meta-analysis	Often early-onset; epileptic spasms may begin after 3 months	(martelli2024clinicalspectrumof pages 2-3, mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15)
Ocular	Ocular abnormalities overall (HP:0000478)	21.4%–70%; about one-third in one multisite Brazilian study	Brazil cohorts/review	Some affected infants had ocular findings without microcephaly	(martelli2024clinicalspectrumof pages 2-3)
Ocular	Fundus abnormalities (HP:0000580)	0%–67.1%	IPD meta-analysis of 12 Brazilian cohorts	Wide heterogeneity across sites	(mirandafilho2025characterizationof843 pages 2-3)
Ocular	Optic nerve abnormalities (HP:0001138)	0%–36.5% across cohorts; 67% in systematic clinicopathologic review	IPD meta-analysis; systematic review	Includes optic nerve pallor/atrophy	(mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15)
Ocular	Retinal lesions / chorioretinal atrophy/scarring (HP:0000556, HP:0007703)	79% retinal lesions in systematic review; examples: chorioretinal atrophy 11/17 eyes (64.7%), macular chorioretinal atrophy/scarring 45.8%	Systematic review; outbreak case series summarized in review	Major cause of visual impairment	(shah2024analysisofcongenital pages 13-15, shah2024analysisofcongenital pages 10-12)
Auditory	Hearing abnormality (HP:0000365)	0%–50% across cohorts; ~20% in systematic clinicopathologic review	IPD meta-analysis; systematic review	Conductive or sensorineural deficits reported	(mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 1-3, shah2024analysisofcongenital pages 13-15)
Musculoskeletal	Arthrogryposis / congenital contractures (HP:0002804, HP:0001371)	~15% in systematic review; 19.0% (n=4) in one summarized series	Systematic review; case series summarized in review	Commonly associated with severe CNS disease and hypertonia	(shah2024analysisofcongenital pages 13-15, shah2024analysisofcongenital pages 10-12)
Musculoskeletal	Hypertonia / spasticity (HP:0001276, HP:0001257)	Hypertonia up to 92%; spasms/spasticity 97%; appendicular hypertonia 94.8% in one series	Systematic review; summarized cohorts	Major contributor to cerebral palsy phenotype	(shah2024analysisofcongenital pages 13-15, shah2024analysisofcongenital pages 10-12)
Musculoskeletal	Quadriparesis / severe motor impairment (HP:0002510, HP:0001270)	Quadriparesis 92%; one cohort reported 81% severe motor function impairment	Systematic review; Brazil cohort review	Usually evident in infancy/early childhood	(shah2024analysisofcongenital pages 13-15, martelli2024clinicalspectrumof pages 3-4)
Feeding-Growth	Dysphagia / swallowing dysfunction (HP:0002015)	17.9%–70% across reviews; 22.2%–67.7% across 12-cohort IPD; oropharyngeal dysphagia 79.3% in microcephaly vs 8.5% in normocephalic peers	Brazil cohorts, review, IPD meta-analysis	Major driver of malnutrition and aspiration risk; ~20% required alternative feeding by age 2	(martelli2024clinicalspectrumof pages 3-4, martelli2024clinicalspectrumof pages 2-3, mirandafilho2025characterizationof843 pages 2-3)
Feeding-Growth	Low birth weight (HP:0001518)	10%–43.8% across cohorts; 23.9% in one infant cohort up to 12 months	IPD meta-analysis; observational cohort	Reflects prenatal growth effects and heterogeneity	(mirandafilho2025characterizationof843 pages 2-3)
Feeding-Growth	Linear growth deficit / short stature (HP:0004322)	39.1% of length-for-age measurements below deficit threshold in one cohort; stunting in literature 14.3%–57.1%	Infant cohort; systematic review of malnutrition studies	Often linked to dysphagia and feeding difficulty	(mirandafilho2025characterizationof843 pages 2-3)
Feeding-Growth	Underweight / wasting (HP:0004325)	Underweight 14.3%–54.4%; wasting 4.3%–48.0%	Systematic review of observational studies in children with CZS	Reflects chronic nutritional vulnerability	(mirandafilho2025characterizationof843 pages 2-3)
Other	Urological impairment	Frequency not pooled; repeatedly reported as common comorbidity	Brazil cohort review	Included as part of broader multisystem CZS spectrum	(martelli2024clinicalspectrumof pages 1-2)
Other	Hospitalization burden	41.4% in children with microcephaly vs 16.2% in normocephalic peers	Brazil cohorts summarized in review	Likely reflects feeding, neurologic, and respiratory complications	(martelli2024clinicalspectrumof pages 3-4)
Other	Mortality	11.3-fold higher mortality up to 36 months in children with CZS / Zika-related microcephaly vs unexposed peers	Systematic review summary	Severe disease substantially increases early-childhood mortality	(shah2024analysisofcongenital pages 13-15)

Epidemiology statistic	Estimate	Population / timeframe	Notes	Supporting citation IDs
CZS proportion among ZIKV-infected pregnancies	4.65% (95% CI 3.38–6.67%)	Systematic review/meta-analysis of ZIKV epidemiology	Pooled estimate for CZS among infected pregnancies	(mccain2026asystematicreview pages 1-2, mccain2026asystematicreview pages 7-7)
Countries/territories with documented autochthonous mosquito-borne ZIKV transmission	92	Global status as of Dec 2023	Transmission likely underrecognized because many infections are asymptomatic/mild	(rabe2025areviewof pages 1-2, rabe2025areviewof pages 3-4)
Brazil confirmed CZS cases	1,858 confirmed; 2,960 suspected under investigation	2015 to epidemiological week 31 of 2023	National surveillance; cases fell sharply after 2017	(martelli2024clinicalspectrumof pages 1-2)
Brazil 2023 reported Zika cases	54,116 cases; incidence 25/100,000; 6,201 laboratory confirmed	Brazil, 2023	Brazil accounted for 97% of reported Americas cases in preliminary 2023 surveillance	(rabe2025areviewof pages 4-5)
Preliminary Americas Zika cases in 2023	55,813 cases from 14 countries; 4 deaths	Americas, 2023 preliminary surveillance	11% laboratory confirmed	(rabe2025areviewof pages 4-5)

Table: These tables summarize the main congenital Zika syndrome phenotypes with quantitative frequency estimates and the most useful recent epidemiology statistics. They are designed for rapid knowledge-base extraction and link each major claim to supporting context IDs.

Key statistics from pooled and review evidence include: - Neuroimaging hallmarks: calcifications and ventriculomegaly are among the most consistent abnormalities (often ~80% in pooled cohorts; very high proportions in clinicopathologic summaries). (mirandafilho2025characterizationof843 pages 2-3, shah2024analysisofcongenital pages 13-15) - Epilepsy: reported prevalence varies with ascertainment/severity and follow-up, ranging from ~30–80% across pooled cohorts and up to ~71% cumulative incidence by age 2 in some microcephaly cohorts. (martelli2024clinicalspectrumof pages 2-3, mirandafilho2025characterizationof843 pages 2-3) - Feeding/swallowing dysfunction: dysphagia is frequently reported (broad ranges across cohorts/reviews), with severe oropharyngeal dysphagia particularly enriched among children with Zika-related microcephaly. (martelli2024clinicalspectrumof pages 3-4)

3.3 Age of onset, progression, severity

Onset: Congenital, with abnormalities present at birth or emerging postnatally (e.g., postnatal microcephaly can occur). (mirandafilho2025characterizationof843 pages 2-3)
Progression: Many outcomes are chronic and severe, including persistent motor impairment and epilepsy; severe disability drives long-term care needs. (martelli2024clinicalspectrumof pages 3-4, shah2024analysisofcongenital pages 13-15)

3.4 Quality of life and family impact

A 2023 integrative review (31 studies) described caregiver burdens spanning social, psychological, economic/material, and health domains, with quantified mental-health burdens in some studies (e.g., 40% mild-to-severe depressive symptoms in one study; 24% mild-to-severe anxiety; 13% high/clinically relevant stress in another). Publication date: 2023-05; URL: https://doi.org/10.1590/1413-81232023285.14852022en (melo2023congenitalzikasyndrome pages 11-12)

4. Genetic / Molecular Information

4.1 Causal genes

CZS is not classically a monogenic disease; the causal factor is infectious (ZIKV). However, host genetic modifiers of susceptibility and severity have been reported. (santos2023associationbetweengenetic pages 1-2, marques2025geneticmodifiersof pages 10-13)

4.2 Pathogenic variants / modifier loci (host genetics)

A 2023 case–control candidate-gene study (Brazil; 245 individuals including mother–infant pairs) reported associations between: - TREM1 rs2234246 with CZS occurrence (e.g., CC genotype OR reported ~4.91 in one comparison; log-additive effects in mothers and children), and - CXCL8 rs4073 and TLR7 rs179008 with severity of microcephaly in affected children. Publication date: 2023-03; URL: https://doi.org/10.1038/s41598-023-30342-3 (santos2023associationbetweengenetic pages 4-5, santos2023associationbetweengenetic pages 1-2)

A 2025 scoping review summarized 23 candidate genes across 13 studies (mixed designs including WES, discordant twin transcriptomics, and candidate-gene cohorts) as potential modifiers; named examples include MTOR (rs2295079) and immune-pathway polymorphisms (e.g., IL28B rs8099917, TNF variants) while emphasizing small sample sizes and need for replication. Publication date: 2025-01; URL: https://doi.org/10.1101/2025.01.02.25319896 (marques2025geneticmodifiersof pages 10-13)

4.3 Epigenetics and chromosomal abnormalities

No specific epigenetic signatures or recurrent chromosomal abnormalities were identified in the retrieved evidence for this run.

5. Environmental Information

5.1 Infectious agent

Pathogen: Zika virus (ZIKV), primarily mosquito-borne (Aedes spp.) with additional sexual and vertical transmission routes. (rabe2025areviewof pages 1-2, martelli2024clinicalspectrumof pages 1-2)

5.2 Environmental/lifestyle contributors

Environmental conditions that facilitate Aedes proliferation (standing water, household exposure, and broader ecological suitability) indirectly increase risk of maternal infection; prevention focuses on vector control and personal protective measures. (crisantolopez2023congenitalzikasyndrome pages 8-10)

6. Mechanism / Pathophysiology (current model)

6.1 Causal chain from trigger to clinical manifestations

Trigger: Maternal ZIKV infection during pregnancy → placental infection and vertical transmission → fetal CNS infection and/or placental insufficiency/inflammatory injury → neurodevelopmental disruption → congenital malformations and long-term neurologic disability. (wong2025zikavirusand pages 3-5, wong2025zikavirusand pages 1-2)

Key mechanistic steps supported by recent reviews: 1. Placental tropism and vertical transmission: ZIKV infects placental cell types including undifferentiated cytotrophoblasts and Hofbauer cells (placental macrophages), establishing intra-placental replication/persistence that can facilitate transfer to fetal circulation. (wong2025zikavirusand pages 3-5) 2. Entry factors and receptors: Receptor/attachment factor usage includes AXL, TYRO3, and TIM1 (including on Hofbauer cells and trophoblast-associated compartments); placental-interface reviews describe receptor-mediated entry as contributory but potentially redundant across systems. (crisantolopez2023congenitalzikasyndrome pages 4-5, wong2025zikavirusand pages 3-5) 3. Innate immune evasion: ZIKV NS5 antagonizes type I interferon responses by promoting STAT2 degradation, suppressing interferon-stimulated gene programs and enabling dissemination. (crisantolopez2023congenitalzikasyndrome pages 4-5, wong2025zikavirusand pages 3-5) 4. Neural progenitor injury: ZIKV infects radial glia/neural progenitors; congenital neuropathogenesis reviews emphasize cell cycle dysregulation, mitochondrial fragmentation, ER stress/unfolded protein response, and p53-mediated intrinsic apoptosis as central pathways leading to loss of progenitor pools and microcephaly. (metzler2024zikavirusneuropathogenesis—research pages 1-2) 5. Inflammation and placental dysfunction: Infection triggers inflammatory signaling, oxidative/ER stress, and metabolic reprogramming in placental cells, contributing to placental insufficiency and adverse fetal outcomes; maternal immune activation cytokines (e.g., IL-6, TNF-α) are implicated in amplifying fetal neurodevelopmental injury. (wong2025zikavirusand pages 1-2, wong2025zikavirusand pages 3-5)

6.2 Suggested ontology terms (examples)

GO biological process (suggested): type I interferon signaling pathway; response to virus; apoptotic process; ER stress response / unfolded protein response; regulation of cell cycle; neurogenesis. (metzler2024zikavirusneuropathogenesis—research pages 1-2, crisantolopez2023congenitalzikasyndrome pages 4-5)
Cell types (CL, suggested): Hofbauer cell (placental macrophage); trophoblast subtypes (cytotrophoblast/extravillous trophoblast/syncytiotrophoblast); radial glia; neural progenitor cell; microglia. (wong2025zikavirusand pages 3-5, metzler2024zikavirusneuropathogenesis—research pages 1-2)

7. Anatomical Structures Affected

7.1 Primary organs and systems

CNS/brain: primary target; includes cortical development abnormalities, ventriculomegaly, calcifications, and brain parenchymal loss. (martelli2024clinicalspectrumof pages 2-3, shah2024analysisofcongenital pages 13-15)
Eye/visual system: retinal and optic nerve lesions. (shah2024analysisofcongenital pages 10-12, shah2024analysisofcongenital pages 13-15)
Musculoskeletal system: congenital contractures/arthrogryposis and long-term spasticity/hypertonia. (martelli2024clinicalspectrumof pages 1-2, shah2024analysisofcongenital pages 13-15)

7.2 Tissue/cell level localization

Placenta (trophoblast lineages and fetal macrophages) is a key site of replication/persistence relevant to transmission; fetal neurogenic zones (ventricular/subventricular regions) are implicated in neural progenitor injury. (wong2025zikavirusand pages 3-5, shah2024analysisofcongenital pages 13-15)

8. Temporal Development (onset and progression)

Onset: congenital; may present at birth or evolve (e.g., postnatal microcephaly). (mirandafilho2025characterizationof843 pages 2-3)
Critical period: First-trimester maternal infection is strongly associated with higher risk of adverse outcomes in at least one controlled cohort. (venancio2025earlyandlongterm pages 1-3)

9. Inheritance and Population

9.1 Epidemiology and geographic distribution

As of December 2023, autochthonous mosquito-borne ZIKV transmission had been documented in 92 countries/territories. Publication date: 2025-02; URL: https://doi.org/10.4269/ajtmh.24-0420 (rabe2025areviewof pages 1-2)
In Brazil, surveillance recorded 1,858 confirmed CZS cases between 2015 and epidemiological week 31 of 2023, with a large number of suspected cases under investigation. (martelli2024clinicalspectrumof pages 1-2)
A systematic review/meta-analysis estimated CZS among infected pregnancies: 4.65% (95% CI 3.38–6.67%). (mccain2026asystematicreview pages 1-2)

9.2 Sex ratio / demographic patterns

The retrieved evidence did not provide a consistent, pooled sex ratio for CZS; cohort-level details exist but were not systematically extractable from the provided snippets.

10. Diagnostics

10.1 Laboratory testing and key constraints

Recent diagnostic synthesis emphasizes two major limitations: - Short NAT window in blood due to transient viremia (often within ~≤7 days of symptom onset), and - Serologic cross-reactivity among flaviviruses (especially dengue vs Zika), complicating IgG/IgM interpretation and requiring confirmatory neutralization testing (PRNT). Publication date: 2025-04; URL: https://doi.org/10.1038/s44298-025-00114-z (madere2025flavivirusinfectionsand pages 5-6, madere2025flavivirusinfectionsand pages 1-2)

10.2 Imaging

Brain CT/MRI abnormalities (cortical atrophy, ventriculomegaly, calcifications) are used as structural markers of severity and part of clinical evaluation of suspected CZS. (martelli2024clinicalspectrumof pages 1-2)

10.3 Differential diagnosis

When congenital infection is suspected, evaluation should exclude other teratogenic infections (e.g., CMV, rubella, toxoplasmosis, syphilis), which is explicitly recommended in clinical management summaries. (crisantolopez2023congenitalzikasyndrome pages 8-10)

11. Outcome / Prognosis

11.1 Neurodevelopmental outcomes after exposure (with and without CZS)

Outcomes vary markedly by whether an infant has classic CZS/microcephaly versus antenatal exposure without congenital findings. - In a matched cohort (Brazil), in utero exposure was associated with IRR 2.7 (95% CI 1.4–5.1) for adverse outcomes overall and increased risks of motor and cognitive delays; early gestational infection showed higher risk. (venancio2025earlyandlongterm pages 1-3) - In a Nicaragua prospective cohort of normocephalic children, adjusted preschool neurodevelopment scores did not differ significantly between exposed and unexposed groups, underscoring heterogeneity across settings and study designs. Publication date: 2024-07; URL: https://doi.org/10.1016/S2214-109X(24)00176-1 (max2024neurodevelopmentinpreschool pages 1-3)

11.2 Mortality

A 2024 systematic clinicopathologic review summarized markedly increased early-childhood mortality in severe CZS presentations (reported as ~11.3-fold higher risk up to 36 months in one cited estimate). (shah2024analysisofcongenital pages 13-15)

12. Treatment

12.1 Current standard of care (real-world implementation)

There is no specific curative treatment for CZS; management is supportive and multidisciplinary, requiring constant monitoring, early intervention/rehabilitation, feeding/nutrition management, and management of epilepsy and motor impairment. (crisantolopez2023congenitalzikasyndrome pages 1-2, shah2024analysisofcongenital pages 13-15)

Suggested MAXO terms (examples; not exhaustively evidenced in retrieved text): - MAXO:0000102 (rehabilitation), MAXO:0000427 (physical therapy), MAXO:0000415 (speech therapy), MAXO:0000600 (nutritional support), MAXO:0000747 (seizure management) — included as ontology suggestions based on the supportive-care emphasis. (shah2024analysisofcongenital pages 13-15, crisantolopez2023congenitalzikasyndrome pages 8-10)

12.2 Experimental / investigational countermeasures

Preclinical evidence summarized in an animal-model review notes repurposed antivirals (e.g., sofosbuvir) in nonhuman primate contexts, but these are not established human therapies for congenital disease in the retrieved evidence. (gardinali2025congenitalzikavirus pages 3-4)

13. Prevention

13.1 Primary prevention

Prevention focuses on reducing maternal infection risk: - Vector control and personal protection: reduction of breeding sites, window/door screens, bed nets, covering clothing, and repellents (e.g., DEET, picaridin/icaridin) are recommended in clinical prevention summaries. (crisantolopez2023congenitalzikasyndrome pages 8-10) - Reproductive counseling and sexual transmission precautions: guidance on delaying conception after exposure and barrier protection for partners is described in clinical guidance summaries. (crisantolopez2023congenitalzikasyndrome pages 8-10)

13.2 Vaccines (status: clinical development, not licensed)

Multiple Zika vaccines have been evaluated in clinical trials; several have completed early-phase studies: - mRNA vaccine (mRNA-1893; Moderna): Phase 2, randomized observer-blind placebo-controlled; COMPLETED; enrollment 808; completion date 2024-07-26; results posted Sept 2025. ClinicalTrials.gov: NCT04917861. (NCT04917861 chunk 1) - DNA vaccine (VRC 5283 plasmid; NIAID): Phase 2/2B randomized vaccine vs placebo; COMPLETED; enrollment 2428; completed 2019-10-04. ClinicalTrials.gov: NCT03110770. (NCT03110770 chunk 1) - Inactivated whole-virus vaccine (VLA1601; Valneva): Phase 1 randomized double-blind dose-finding; COMPLETED; ~150 participants; two-dose regimen (Day 1/29). ClinicalTrials.gov: NCT06334393. (NCT06334393 chunk 1)

These trials are aimed at preventing ZIKV infection (and downstream congenital disease) but do not constitute current standard-of-care prevention in routine practice given the absence of a licensed vaccine in the retrieved evidence. (rabe2025areviewof pages 1-2, NCT04917861 chunk 1)

14. Other Species / Natural Disease

ZIKV congenital outcomes are modeled across species; the evidence here primarily supports experimental susceptibility rather than naturally occurring veterinary disease burdens.

15. Model Organisms (mechanism and translational research)

15.1 Major model systems and what they recapitulate

Human brain organoids / iPSC-derived neural progenitors: reproduce preferential infection of neural progenitors and outcomes such as reduced organoid size, thinner cortical layers, and increased cell death; useful for mechanistic dissection and therapeutic screening but lower throughput and complex. (metzler2024zikavirusneuropathogenesis—research pages 13-14)
Mouse models (often IFN-pathway modified or humanized): widely used but require immune manipulation because ZIKV immune-evasion interactions (e.g., NS5–STAT2) are species-specific; models can reproduce fetal loss, growth restriction, brain malformations, and neurodevelopmental phenotypes. (metzler2024zikavirusneuropathogenesis—research pages 13-14, horvath2025ahumanizedmouse pages 1-5)
Nonhuman primates (rhesus macaques): high translational relevance for placental infection and fetal outcomes; costly and lower throughput; reported fetal demise around ~26% in early gestation infection in one summary. (metzler2024zikavirusneuropathogenesis—research pages 13-14)

15.2 Limitations

Key limitations include differences in placentation/anatomy and interferon biology across species, and the need for immune suppression/genetic modification in many rodent studies, which can distort the human-like spectrum. (gardinali2025congenitalzikavirus pages 2-3, metzler2024zikavirusneuropathogenesis—research pages 13-14)

Expert opinion and synthesis (authoritative analyses)

Surveillance-focused experts emphasize that ZIKV remains a public-health threat due to re-emergence potential, diagnostic limitations, and ongoing transmission across many regions, recommending targeted surveillance and clear testing algorithms. (rabe2025areviewof pages 1-2)
Brazil-focused clinical experts stress heterogeneity of outcomes (including children without abnormalities at birth) and the need for standardized protocols and long-term cohort follow-up with appropriate controls. (martelli2024clinicalspectrumof pages 1-2, martelli2024clinicalspectrumof pages 3-4)

Evidence limitations / gaps for knowledge-base completion

Formal identifiers beyond ICD-11 KA62.0 (e.g., MONDO, Orphanet, ICD-10, MeSH descriptor specifically for congenital Zika syndrome) were not directly retrievable in the provided full-text evidence, and should be filled by direct ontology lookup (e.g., ICD-11 MMS browser, MONDO, MeSH). (martelli2024clinicalspectrumof pages 2-3, crisantolopez2023congenitalzikasyndrome pages 8-10)
Some mechanistic claims remain model-dependent; receptor usage and ADE-related hypotheses require careful interpretation and human validation. (wong2025zikavirusand pages 2-3)

References

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(shah2024analysisofcongenital pages 1-3): Dhaara Shah, Dhairavi Shah, Olivia Mua, and Rana Zeine. Analysis of congenital zika syndrome clinicopathologic findings reported in the 8 years since the brazilian outbreak. Exploration of Neuroprotective Therapy, pages 82-99, Feb 2024. URL: https://doi.org/10.37349/ent.2024.00072, doi:10.37349/ent.2024.00072. This article has 3 citations.
(mccain2026asystematicreview pages 7-7): Kelly McCain, Anna Vicco, Christian Morgenstern, Thomas Rawson, Tristan M. Naidoo, Sangeeta Bhatia, Dominic P. Dee, Patrick Doohan, Keith Fraser, Anna-Maria Hartner, Sequoia I. Leuba, Shazia Ruybal-Pesántez, Richard J. Sheppard, H. Juliette T. Unwin, Kelly Charniga, Zulma M. Cucunubá, Gina Cuomo-Dannenburg, Natsuko Imai-Eaton, Edward S. Knock, Adam Kucharski, Mantra Kusumgar, Paul Liétar, Rebecca K. Nash, Sabine van Elsland, Aaron Morris, Alpha Forna, Amy Dighe, Anna-Maria Hartner, Anne Cori, Arran Hamlet, Ben Lambert, Bethan Cracknell Daniels, Charles Whittaker, Cosmo Santoni, Cyril Geismar, Dariya Nikitin, David Jorgensen, Dominic P. Dee, Edward S. Knock, Hayley Thompson, Isobel Routledge, Jack Wardle, Janetta Skarp, Joseph Hicks, Kanchan Parchani, Kieran Drake, Lily Geidelberg, Lorenzo Cattarino, Mara Kont, Marc Baguelin, Pablo N. Perez-Guzman, Paula Christen, Rebecca Nash, Richard Fitzjohn, Richard Sheppard, Rob Johnson, Sabine van Elsland, Sequoia I. Leuba, Shazia Ruybal-Pesántez, Sreejith Radhakrishnan, Tristan M. Naidoo, Zulma M. Cucunubá, Nuno R. Faria, Anne Cori, Ruth McCabe, and Ilaria Dorigatti. A systematic review and meta-analysis of zika virus epidemiology. Nature Health, 1:355-367, Feb 2026. URL: https://doi.org/10.1038/s44360-025-00051-4, doi:10.1038/s44360-025-00051-4. This article has 1 citations.
(rabe2025areviewof pages 1-2): Ingrid B. Rabe, Susan L. Hills, Joana M. Haussig, Allison T. Walker, Thais dos Santos, José Luis San Martin, Gamaliel Gutierrez, Jairo Mendez-Rico, José Cruz Rodriguez, Douglas Elizondo-Lopez, Gabriel Gonzalez-Escobar, Emmanuel Chanda, Samira M. Al Eryani, Chiori Kodama, Aya Yajima, Manish Kakkar, Masaya Kato, Pushpa R. Wijesinghe, Sudath Samaraweera, Hannah Brindle, Hasitha Tissera, James Kelley, Eve Lackritz, and Diana P. Rojas. A review of the recent epidemiology of zika virus infection. The American Journal of Tropical Medicine and Hygiene, 112:1026-1035, Feb 2025. URL: https://doi.org/10.4269/ajtmh.24-0420, doi:10.4269/ajtmh.24-0420. This article has 63 citations.
(rabe2025areviewof pages 3-4): Ingrid B. Rabe, Susan L. Hills, Joana M. Haussig, Allison T. Walker, Thais dos Santos, José Luis San Martin, Gamaliel Gutierrez, Jairo Mendez-Rico, José Cruz Rodriguez, Douglas Elizondo-Lopez, Gabriel Gonzalez-Escobar, Emmanuel Chanda, Samira M. Al Eryani, Chiori Kodama, Aya Yajima, Manish Kakkar, Masaya Kato, Pushpa R. Wijesinghe, Sudath Samaraweera, Hannah Brindle, Hasitha Tissera, James Kelley, Eve Lackritz, and Diana P. Rojas. A review of the recent epidemiology of zika virus infection. The American Journal of Tropical Medicine and Hygiene, 112:1026-1035, Feb 2025. URL: https://doi.org/10.4269/ajtmh.24-0420, doi:10.4269/ajtmh.24-0420. This article has 63 citations.
(santos2023associationbetweengenetic pages 1-2): Camilla Natália Oliveira Santos, Lucas Sousa Magalhães, Adriana Barbosa de Lima Fonseca, Ana Jovina Barreto Bispo, Roseane Lima Santos Porto, Juliana Cardoso Alves, Cliomar Alves dos Santos, Jaira Vanessa de Carvalho, Angela Maria da Silva, Mauro Martins Teixeira, Roque Pacheco de Almeida, Priscila Lima dos Santos, and Amélia Ribeiro de Jesus. Association between genetic variants in trem1, cxcl10, il4, cxcl8 and tlr7 genes with the occurrence of congenital zika syndrome and severe microcephaly. Scientific Reports, Mar 2023. URL: https://doi.org/10.1038/s41598-023-30342-3, doi:10.1038/s41598-023-30342-3. This article has 22 citations and is from a peer-reviewed journal.
(marques2025geneticmodifiersof pages 10-13): Fernanda J P Marques, Janet Ruan, Rozel B. Razal, Marcio Leyser, and Youssef A. Kousa. Genetic modifiers of prenatal brain injury after zika virus infection: a scoping review. medRxiv : the preprint server for health sciences, Jan 2025. URL: https://doi.org/10.1101/2025.01.02.25319896, doi:10.1101/2025.01.02.25319896. This article has 0 citations.
(santos2023associationbetweengenetic pages 4-5): Camilla Natália Oliveira Santos, Lucas Sousa Magalhães, Adriana Barbosa de Lima Fonseca, Ana Jovina Barreto Bispo, Roseane Lima Santos Porto, Juliana Cardoso Alves, Cliomar Alves dos Santos, Jaira Vanessa de Carvalho, Angela Maria da Silva, Mauro Martins Teixeira, Roque Pacheco de Almeida, Priscila Lima dos Santos, and Amélia Ribeiro de Jesus. Association between genetic variants in trem1, cxcl10, il4, cxcl8 and tlr7 genes with the occurrence of congenital zika syndrome and severe microcephaly. Scientific Reports, Mar 2023. URL: https://doi.org/10.1038/s41598-023-30342-3, doi:10.1038/s41598-023-30342-3. This article has 22 citations and is from a peer-reviewed journal.
(wong2025zikavirusand pages 1-2): Sam Chak Sum Wong, Joshua Fung, Pak-Ting Hau, Yanjie Guo, Philip C. N. Chiu, Hong Wa Yung, Gilman Kit Hang Siu, Franklin Wang-Ngai Chow, and Cheuk-Lun Lee. Zika virus and the fetal-maternal interface: deciphering the mechanisms of placental infection and implications for pregnancy outcomes. Jul 2025. URL: https://doi.org/10.1080/22221751.2025.2532681, doi:10.1080/22221751.2025.2532681. This article has 6 citations and is from a domain leading peer-reviewed journal.
(metzler2024zikavirusneuropathogenesis—research pages 1-2): Anna D. Metzler and Hengli Tang. Zika virus neuropathogenesis—research and understanding. Pathogens, 13:555, Jul 2024. URL: https://doi.org/10.3390/pathogens13070555, doi:10.3390/pathogens13070555. This article has 23 citations.
(madere2025flavivirusinfectionsand pages 5-6): Ferralita S. Madere, Aurea Virginia Andrade da Silva, Efemena Okeze, Emma Tilley, Andriyan Grinev, Krishnamurthy Konduru, Mayra García, and Maria Rios. Flavivirus infections and diagnostic challenges for dengue, west nile and zika viruses. npj Viruses, Apr 2025. URL: https://doi.org/10.1038/s44298-025-00114-z, doi:10.1038/s44298-025-00114-z. This article has 43 citations.
(madere2025flavivirusinfectionsand pages 1-2): Ferralita S. Madere, Aurea Virginia Andrade da Silva, Efemena Okeze, Emma Tilley, Andriyan Grinev, Krishnamurthy Konduru, Mayra García, and Maria Rios. Flavivirus infections and diagnostic challenges for dengue, west nile and zika viruses. npj Viruses, Apr 2025. URL: https://doi.org/10.1038/s44298-025-00114-z, doi:10.1038/s44298-025-00114-z. This article has 43 citations.
(max2024neurodevelopmentinpreschool pages 1-3): Ryan Max, Christian Toval-Ruiz, Sylvia Becker-Dreps, Anna M Gajewski, Evelin Martinez, Kaitlyn Cross, Bryan Blette, Oscar Ortega, Damaris Collado, Omar Zepeda, Itziar Familiar, Michael J Boivin, Meylin Chavarria, María José Meléndez, Juan Carlos Mercado, Aravinda de Silva, Matthew H Collins, Daniel Westreich, Sandra Bos, Eva Harris, Angel Balmaseda, Emily W Gower, Natalie M Bowman, Elizabeth Stringer, and Filemón Bucardo. Neurodevelopment in preschool children exposed and unexposed to zika virus in utero in nicaragua: a prospective cohort study. The Lancet. Global health, 12:e1129-e1138, Jul 2024. URL: https://doi.org/10.1016/s2214-109x(24)00176-1, doi:10.1016/s2214-109x(24)00176-1. This article has 7 citations.
(gardinali2025congenitalzikavirus pages 3-4): Noemi Rovaris Gardinali, Renato Sergio Marchevsky, Yara Cavalcante Vieira, Marcelo Pelajo-Machado, Tatiana Kugelmeier, Juliana Gil Melgaço, Márcio Pinto Castro, Jaqueline Mendes de Oliveira, and Marcelo Alves Pinto. Congenital zika virus infection in laboratory animals: a comparative review highlights translational studies on the maternal-foetal interface. Memórias do Instituto Oswaldo Cruz, Feb 2025. URL: https://doi.org/10.1590/0074-02760240125, doi:10.1590/0074-02760240125. This article has 1 citations.
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(metzler2024zikavirusneuropathogenesis—research pages 13-14): Anna D. Metzler and Hengli Tang. Zika virus neuropathogenesis—research and understanding. Pathogens, 13:555, Jul 2024. URL: https://doi.org/10.3390/pathogens13070555, doi:10.3390/pathogens13070555. This article has 23 citations.
(horvath2025ahumanizedmouse pages 1-5): Allison R. Horvath, Clara M. Abdelmalek, Eunbin Park, Aubrey P. Alexander, Sadhana A. Maheswaran, Arnav H. Patel, Nandi G. Patel, Janet E. Ruan, Ademide T. Adeyemo, Erin C. Li, Katherine E. Helmicki, Stephen Lin, Paul C. Wang, Zhen Li, Li Wang, Heather A. Gordish-Dressman, Tarik F. Haydar, Tamer A. Mansour, and Youssef A. Kousa. A humanized mouse model system mimics prenatal zika infection and reveals premature differentiation of neural stem cells. bioRxiv, Feb 2025. URL: https://doi.org/10.1101/2025.02.21.639556, doi:10.1101/2025.02.21.639556. This article has 2 citations.
(gardinali2025congenitalzikavirus pages 2-3): Noemi Rovaris Gardinali, Renato Sergio Marchevsky, Yara Cavalcante Vieira, Marcelo Pelajo-Machado, Tatiana Kugelmeier, Juliana Gil Melgaço, Márcio Pinto Castro, Jaqueline Mendes de Oliveira, and Marcelo Alves Pinto. Congenital zika virus infection in laboratory animals: a comparative review highlights translational studies on the maternal-foetal interface. Memórias do Instituto Oswaldo Cruz, Feb 2025. URL: https://doi.org/10.1590/0074-02760240125, doi:10.1590/0074-02760240125. This article has 1 citations.

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Pathophysiology

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Deep Research

1. Disease Information

1.1 Concise overview

1.2 Key identifiers (ontology/classification)

1.3 Common synonyms / alternative names

1.4 Evidence provenance (individual patients vs aggregated)

2. Etiology

2.1 Disease causal factors

2.2 Risk factors

2.3 Protective factors

2.4 Gene–environment interactions (GxE)

3. Phenotypes (clinical spectrum)

3.1 Core phenotype summary (current understanding)

3.2 Quantitative phenotype frequencies and statistics (selected recent syntheses)

3.3 Age of onset, progression, severity

3.4 Quality of life and family impact

4. Genetic / Molecular Information

4.1 Causal genes

4.2 Pathogenic variants / modifier loci (host genetics)

4.3 Epigenetics and chromosomal abnormalities

5. Environmental Information

5.1 Infectious agent

5.2 Environmental/lifestyle contributors

6. Mechanism / Pathophysiology (current model)

6.1 Causal chain from trigger to clinical manifestations

6.2 Suggested ontology terms (examples)

7. Anatomical Structures Affected

7.1 Primary organs and systems

7.2 Tissue/cell level localization

8. Temporal Development (onset and progression)

9. Inheritance and Population

9.1 Epidemiology and geographic distribution

9.2 Sex ratio / demographic patterns

10. Diagnostics

10.1 Laboratory testing and key constraints

10.2 Imaging

10.3 Differential diagnosis

11. Outcome / Prognosis

11.1 Neurodevelopmental outcomes after exposure (with and without CZS)

11.2 Mortality

12. Treatment

12.1 Current standard of care (real-world implementation)

12.2 Experimental / investigational countermeasures

13. Prevention

13.1 Primary prevention

13.2 Vaccines (status: clinical development, not licensed)

14. Other Species / Natural Disease

15. Model Organisms (mechanism and translational research)

15.1 Major model systems and what they recapitulate

15.2 Limitations

Expert opinion and synthesis (authoritative analyses)

Evidence limitations / gaps for knowledge-base completion

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