Parvovirus B19 is a single-stranded DNA virus that primarily infects erythroid progenitor cells, causing erythema infectiosum (fifth disease) in children and arthropathy in adults. It can cause severe complications including transient aplastic crisis in patients with hemolytic disorders and hydrops fetalis in pregnant women.
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name: Parvovirus B19 Infection
creation_date: '2025-12-04T16:57:31Z'
updated_date: '2026-04-22T20:13:21Z'
description: Parvovirus B19 is a single-stranded DNA virus that primarily infects erythroid progenitor cells, causing erythema infectiosum (fifth disease) in children and arthropathy in adults. It can cause severe complications including transient aplastic crisis in patients with hemolytic disorders and hydrops fetalis in pregnant women.
category: Viral Disease
parents:
- Infectious Disease
- Childhood Infection
prevalence:
- population: Global
percentage: Common
evidence:
- reference: PMID:25990962
reference_title: "Parvovirus B19V infection in Israel: prevalence and occurrence of acute infection between 2008 and 2013."
supports: PARTIAL
snippet: The overall IgG prevalence in the 1008 representative sera samples was 61.4% and the age-adjusted prevalence rate was 58.2%.
explanation: The study provides data on the prevalence of Parvovirus B19 infection in the Israeli population, indicating that a significant portion of the population has been exposed to the virus. However, this is specific to Israel and may not represent the global population.
- reference: PMID:27806994
reference_title: "Human Parvoviruses."
supports: PARTIAL
snippet: These viruses are prevalent worldwide and are culturable in vitro, and serological and molecular assays are available but require careful interpretation of results.
explanation: The article mentions that Parvovirus B19 is prevalent worldwide, supporting the statement to some extent. However, it does not provide specific global prevalence percentages.
- reference: PMID:21040396
reference_title: "Parvovirus B19 infection in human pregnancy."
supports: PARTIAL
snippet: Human parvovirus B19 infection is widespread. Approximately 30-50% of pregnant women are nonimmune, and vertical transmission is common following maternal infection in pregnancy.
explanation: The article indicates that Parvovirus B19 infection is widespread and provides specific data on nonimmune pregnant women, suggesting significant exposure rates. However, it does not provide a comprehensive global percentage.
- reference: PMID:31266615
reference_title: "Global Perspective on Hepatitis B Virus Infections in the Era of Effective Vaccines."
supports: NO_EVIDENCE
snippet: Hepatitis B virus (HBV) infection is a global health burden.
explanation: This article focuses on Hepatitis B virus infection and does not provide information relevant to Parvovirus B19 infection.
- reference: PMID:36619750
reference_title: "Human parvovirus B19 infection in hospitalized patients suspected of infection with pathogenic microorganism."
supports: PARTIAL
snippet: The HPV B19 infection rate in hospitalized patients suspected of microbial infection was 2.22%.
explanation: The study provides specific data on the infection rate among hospitalized patients, which suggests that Parvovirus B19 can be present in specific populations. However, it does not provide global prevalence data.
- reference: PMID:30843782
reference_title: "Low human parvovirus B19 (B19V) DNA prevalence in blood donors from Central-West Brazil."
supports: PARTIAL
snippet: Parvovirus B19 (B19V) transmission may occur through blood transfusion as a result of asymptomatic viral persistence in blood donors.
explanation: The study indicates that Parvovirus B19 can persist in blood donors, suggesting potential widespread exposure. However, it does not provide specific global prevalence percentages.
infectious_agent:
- name: Parvovirus B19
infectious_agent_term:
preferred_term: Human parvovirus B19
term:
id: NCBITaxon:10798
label: Human parvovirus B19
description: A single-stranded DNA virus known to cause several clinical conditions, particularly in children.
evidence:
- reference: PMID:25283854
reference_title: "Human parvovirus B19: a review."
supports: SUPPORT
snippet: Parvovirus B19 (B19V) is a small non-enveloped single-stranded DNA (ssDNA) virus of the family Parvoviridae, the subfamily Parvovirinae, the genus Erythrovirus and Human parvovirus B19 type species.
explanation: The reference confirms that Parvovirus B19 is a single-stranded DNA virus.
- reference: PMID:15485533
reference_title: "Parvovirus B19 infections."
supports: SUPPORT
snippet: Parvovirus B19 infections cause a wide range of clinical findings, including erythema infectiosum, 'glove-and-socks' syndrome, arthropathies, red cell aplasia, and intrauterine infections.
explanation: The reference supports that Parvovirus B19 causes several clinical conditions.
- reference: PMID:33944819
reference_title: "A Parsonage-Turner Syndrome secondary to Parvovirus B19 infection."
supports: SUPPORT
snippet: Parvovirus B19 (PVB19) is a small DNA virus that causes the fifth disease in children; however it can also affect adults.
explanation: The reference supports that Parvovirus B19 causes clinical conditions, particularly in children.
- reference: PMID:31850715
reference_title: "The Role of Human Parvovirus B19 in the Pediatric Patients with Pancytopenia?"
supports: SUPPORT
snippet: Parvoviruses are small DNA viruses causing erythema infectiosum, which is known as the fifth disease.
explanation: The reference supports that Parvovirus B19 is a single-stranded DNA virus causing clinical conditions.
transmission:
- name: Respiratory Droplets
description: Spread through inhalation of respiratory droplets from infected individuals.
evidence:
- reference: PMID:25283854
reference_title: "Human parvovirus B19: a review."
supports: SUPPORT
snippet: It is a common community-acquired respiratory pathogen without ethnic, socioeconomic, gender, age or geographic boundaries
explanation: The abstract indicates that Parvovirus B19 is a respiratory pathogen, which supports the statement that it spreads through inhalation of respiratory droplets.
- reference: PMID:35192759
reference_title: "Algorithm for laboratory diagnostics of parvoviral infection in risk groups."
supports: SUPPORT
snippet: Parvovirus infection (PVI) is widespread, characterized by airborne, bloodborne and vertical transmission routes.
explanation: The abstract mentions that Parvovirus B19 has airborne transmission routes, which supports the statement about respiratory droplets.
- name: Vertical Transmission
description: Transmission from mother to fetus during pregnancy.
evidence:
- reference: PMID:22777688
reference_title: "Parvovirus B19 in pregnancy: possible consequences of vertical transmission."
supports: SUPPORT
snippet: The vertical transmission rate was 31.7% (20/63).
explanation: The study confirms that Parvovirus B19 can be transmitted from mother to fetus during pregnancy, with a vertical transmission rate of 31.7%.
- reference: PMID:38861626
reference_title: "Vertical Transplacental Infections."
supports: SUPPORT
snippet: Vertical transmission of an infectious agent is generally defined as transmission from a pregnant individual to their fetus... Parvovirus B19... are also known to cause transplacental infections.
explanation: The article explicitly states that Parvovirus B19 is known to cause transplacental (vertical) infections.
- reference: PMID:17505458
reference_title: "Viral infections in pregnancy."
supports: SUPPORT
snippet: Human parvovirus B19 is a DNA virus with strong tropism for erythroid precursors and infection during pregnancy can result in fetal hydrops and stillbirth.
explanation: This reference supports the statement by indicating that Parvovirus B19 infection during pregnancy can lead to severe outcomes like fetal hydrops, which implies vertical transmission.
- reference: PMID:26044725
reference_title: "[Parvovirus B19 infection and pregnancy]."
supports: SUPPORT
snippet: During pregnancy, this virus is responsible for abortion, fetal anemia. Severe anemia can cause hydrops fetalis or fetal mortality in utero or neurologic damage.
explanation: The reference supports the statement by detailing the adverse effects of Parvovirus B19 infection during pregnancy, indicating vertical transmission.
- reference: PMID:21351281
reference_title: "Parvovirus B19 infection in pregnancy: new insights and management."
supports: SUPPORT
snippet: In this article, we review the virology, pathology, epidemiology and clinical spectrum of intrauterine human parvovirus B19 (B19V) infection, including intrauterine fetal death, non-immune hydrops fetalis, thrombocytopenia and neurological manifestations.
explanation: The article reviews the clinical spectrum of intrauterine B19 infection, supporting the concept of vertical transmission.
- reference: PMID:27235921
reference_title: "Toxoplasmosis, Parvovirus, and Cytomegalovirus in Pregnancy."
supports: SUPPORT
snippet: Among these are toxoplasmosis, parvovirus B19, and cytomegalovirus. These infections have an important impact on the developing fetus, depending on the timing of infection.
explanation: The review highlights the significant impact of Parvovirus B19 on the developing fetus, indicating vertical transmission.
- reference: PMID:18198003
reference_title: "Seroprevalence of parvovirus B19 in the German population."
supports: SUPPORT
snippet: After vertical transmission the infected fetus may develop hydrops fetalis.
explanation: The reference explicitly mentions vertical transmission of Parvovirus B19 and its consequences, such as hydrops fetalis.
- name: Blood Transfusion
description: Transmission through contaminated blood products.
evidence:
- reference: PMID:21332725
reference_title: "Symptomatic parvovirus B19 infection caused by blood component transfusion."
supports: SUPPORT
snippet: Eight patients with TT-B19V caused by component transfusion have been identified.
explanation: The study identified eight patients who developed parvovirus B19 infection through blood component transfusion, supporting the statement.
- reference: PMID:9031493
reference_title: "Human parvovirus B19 and blood products."
supports: SUPPORT
snippet: Recent concerns regarding the potential transmission of B19 infection by pooled plasma products.
explanation: The review addresses the potential transmission of parvovirus B19 through blood products, supporting the statement.
- reference: PMID:15645675
reference_title: "Variants of B19."
supports: SUPPORT
snippet: Parvovirus B19 is therefore not an uncommon 'contaminant' of blood and blood products.
explanation: The abstract mentions that parvovirus B19 can contaminate blood and blood products, supporting the statement.
pathophysiology:
- name: Viral Replication
description: The virus primarily targets erythroid progenitor cells in the bone marrow, leading to disrupted red blood cell production.
cell_types:
- preferred_term: Erythroid Progenitor Cells
term:
id: CL:0000038
label: erythroid progenitor cell
biological_processes:
- preferred_term: viral genome replication
term:
id: GO:0019079
label: viral genome replication
- preferred_term: DNA replication
term:
id: GO:0006260
label: DNA replication
locations:
- preferred_term: bone marrow
term:
id: UBERON:0002371
label: bone marrow
evidence:
- reference: PMID:9372060
reference_title: "Human parvovirus B19 infection."
supports: SUPPORT
snippet: Human parvovirus B19 shows remarkable tropism for human erythroid progenitor cells.
explanation: The abstract clearly states that Parvovirus B19 has a strong preference for infecting human erythroid progenitor cells.
- reference: PMID:26845771
reference_title: "Parvovirus B19 Replication and Expression in Differentiating Erythroid Progenitor Cells."
supports: SUPPORT
snippet: The pathogenic Parvovirus B19 (B19V) is characterized by a strict adaptation to erythroid progenitor cells (EPCs)...
explanation: The study describes the infection dynamics of Parvovirus B19 in erythroid progenitor cells, supporting the statement that the virus primarily targets these cells.
- reference: PMID:37175911
reference_title: "Non-Permissive Parvovirus B19 Infection: A Reservoir and Questionable Safety Concern in Mesenchymal Stem Cells."
supports: SUPPORT
snippet: Parvovirus B19V (B19V) is a common human pathogen that infects bone marrow erythroid progenitor cells, leading to transient or persistent anemia.
explanation: The abstract mentions that Parvovirus B19 infects erythroid progenitor cells in the bone marrow, aligning with the statement.
- reference: PMID:21680529
reference_title: "Parvovirus B19 infection of human primary erythroid progenitor cells triggers ATR-Chk1 signaling, which promotes B19 virus replication."
supports: SUPPORT
snippet: Human parvovirus B19 (B19V) infection is restricted to erythroid progenitor cells of the human bone marrow.
explanation: The abstract confirms the restriction of Parvovirus B19 infection to erythroid progenitor cells in the bone marrow.
- reference: PMID:28377277
reference_title: "Hydroxyurea inhibits parvovirus B19 replication in erythroid progenitor cells."
supports: SUPPORT
snippet: Parvovirus B19 (B19V) infection is restricted to erythroid progenitor cells (EPCs) of the human bone marrow, leading to transient arrest of erythropoiesis...
explanation: The study indicates that Parvovirus B19 infection is limited to erythroid progenitor cells and disrupts red blood cell production.
- reference: PMID:35062288
reference_title: "A Functional Minigenome of Parvovirus B19."
supports: SUPPORT
snippet: Parvovirus B19 (B19V) is a human pathogenic virus of clinical relevance, characterized by a selective tropism for erythroid progenitor cells in bone marrow.
explanation: The abstract highlights the selective tropism of Parvovirus B19 for erythroid progenitor cells in the bone marrow.
- reference: PMID:12116854
reference_title: "Parvovirus B19 and erythroid cells."
supports: SUPPORT
snippet: Parvovirus B19 is a human erythrovirus, i.e. which induces the death of erythroid progenitors.
explanation: The abstract states that Parvovirus B19 induces the death of erythroid progenitors, supporting the statement.
- name: Immune Response
description: Immune-mediated response to the virus can lead to rash and joint symptoms.
evidence:
- reference: PMID:37434352
reference_title: "Parvovirus B19 Infection: A Vasculitis Masquerade in an Elderly Patient."
supports: SUPPORT
snippet: Notably, adult patients with B19V infection frequently experience joint pain and cutaneous eruptions, which are ostensibly immune responses to the infection and necessitate careful differentiation from autoimmunity.
explanation: The reference describes joint pain and skin rash as immune responses to Parvovirus B19 infection, supporting the statement.
- reference: PMID:9595838
reference_title: "Parvovirus: a review."
supports: SUPPORT
snippet: Infections caused by human parvovirus B19 result in a variety of clinical manifestations, the severity of which depends on the immune and hematologic status of the host. Arthropathy is known to occur in children and adults with acute parvovirus B19 infection.
explanation: The reference mentions that arthropathy (joint symptoms) occurs in individuals with Parvovirus B19 infection, supporting the statement.
- name: Receptor-Mediated Entry
description: Initial viral entry involves binding to globoside (P antigen) on cell surfaces, followed by VP1u-mediated internalization into erythroid progenitor cells. Acidic pH in endosomes facilitates globoside-dependent infectious trafficking and VP1u conformational changes for endosomal escape.
biological_processes:
- preferred_term: viral entry into host cell
term:
id: GO:0046718
label: symbiont entry into host cell
- preferred_term: endocytosis
term:
id: GO:0006897
label: endocytosis
locations:
- preferred_term: bone marrow
term:
id: UBERON:0002371
label: bone marrow
- preferred_term: fetal liver
term:
id: UBERON:0002107
label: liver
notes: The VP1u domain contains a PLA2-like motif critical for membrane penetration and endosomal escape.
- name: Cell Cycle Arrest and Apoptosis
description: Viral NS1 protein and replication intermediates activate the DNA damage response (DDR) pathway, particularly ATR and DNA-PKcs, leading to late S/G2 phase arrest and apoptotic death of infected erythroid progenitor cells.
genes:
- preferred_term: ATR
term:
id: hgnc:882
label: ATR
- preferred_term: PRKDC
term:
id: hgnc:9413
label: PRKDC
biological_processes:
- preferred_term: DNA damage response
term:
id: GO:0006974
label: DNA damage response
- preferred_term: cell cycle arrest
term:
id: GO:0051726
label: regulation of cell cycle
- preferred_term: apoptotic process
term:
id: GO:0006915
label: apoptotic process
cell_types:
- preferred_term: Erythroid Progenitor Cells
term:
id: CL:0000038
label: erythroid progenitor cell
notes: The transient block in erythropoiesis explains aplastic crises in susceptible individuals.
- name: EPO-STAT5 Signaling Pathway
description: Erythropoietin (EPO) signaling through STAT5A and STAT5B creates a permissive transcriptional environment for B19V replication in erythroid progenitor cells. Hypoxic conditions enhance STAT5A activity and viral replication.
genes:
- preferred_term: EPOR
term:
id: hgnc:3416
label: EPOR
- preferred_term: STAT5A
term:
id: hgnc:11366
label: STAT5A
- preferred_term: STAT5B
term:
id: hgnc:11367
label: STAT5B
biological_processes:
- preferred_term: JAK-STAT cascade
term:
id: GO:0007259
label: cell surface receptor signaling pathway via JAK-STAT
cell_types:
- preferred_term: Erythroid Progenitor Cells
term:
id: CL:0000038
label: erythroid progenitor cell
phenotypes:
- category: Dermatologic
name: Erythema Infectiosum (Fifth Disease)
description: Classic childhood exanthem characterized by facial erythema (slapped cheek) followed by lacy reticular rash on trunk and extremities.
frequency: VERY_FREQUENT
diagnostic: true
sequelae:
- target: Slapped Cheek Rash
description: Bright red facial erythema confined to the cheeks, giving the appearance of having been slapped.
evidence:
- reference: PMID:37132144
reference_title: "Erythema Infectiosum: A Narrative Review."
supports: SUPPORT
snippet: Erythema infectiosum, the most common clinical manifestation of parvovirus B19 infection, is characterized by a 'slapped cheek' appearance on the face and lacy exanthem on the trunk and extremities.
explanation: This reference supports the statement that erythema infectiosum, also known as fifth disease, is a very frequent dermatologic manifestation of parvovirus B19 infection and includes the slapped cheek rash as a sequela.
- reference: PMID:10821497
reference_title: "The cutaneous manifestations of human parvovirus B19 infection."
supports: SUPPORT
snippet: The prototypical cutaneous manifestations of human parvovirus B19 (B19) infection include a petechial eruption in a glove and stocking distribution, reticular truncal erythema, and the 'slapped cheek' sign.
explanation: This reference supports the statement by describing erythema infectiosum and the slapped cheek sign as characteristic dermatologic manifestations of parvovirus B19 infection.
- reference: PMID:8042568
reference_title: "Erythema infectiosum and other parvovirus B19 infections."
supports: SUPPORT
snippet: The human parvovirus B19 has been identified as the causative agent in several diseases, including the benign childhood condition erythema infectiosum (fifth disease)...
explanation: This reference supports the statement by identifying erythema infectiosum as a condition caused by parvovirus B19.
- reference: PMID:24195090
reference_title: "Pediatric parvovirus B19: spectrum of clinical manifestations."
supports: SUPPORT
snippet: The most common manifestation of PVB19 infection in children is erythema infectiosum (EI). Also known as fifth disease or slapped cheek syndrome, EI presents as an erythematous exanthem limited to the malar eminences that follows a mild prodromal illness.
explanation: This reference supports the statement by confirming that erythema infectiosum is the most common manifestation of parvovirus B19 infection in children and includes the slapped cheek rash.
- category: Hematologic
name: Transient Aplastic Crisis
description: Acute cessation of red blood cell production causing severe anemia in patients with underlying hemolytic disorders.
frequency: OCCASIONAL
context: In individuals with hemolytic disorders.
evidence:
- reference: PMID:8649911
reference_title: "Diverse hematologic effects of parvovirus B19 infection."
supports: SUPPORT
snippet: Human parvovirus B19 is linked with a broadening spectrum of hematologic disorders, including aplastic crises in the context of hemolytic anemias.
explanation: The statement is supported as the reference mentions that parvovirus B19 is linked with aplastic crises in individuals with hemolytic anemias.
- reference: PMID:24962467
reference_title: "Quantitation of human parvovirus B19 DNA in erythema infectiosum and aplastic crisis."
supports: SUPPORT
snippet: The serum B19V DNA load during the acute phase of aplastic crisis complicating chronic hemolytic anemia was extremely high.
explanation: The reference supports that parvovirus B19 infection can cause transient aplastic crisis in individuals with chronic hemolytic anemia.
- reference: PMID:26940953
reference_title: "Original Research: Parvovirus B19 infection in children with sickle cell disease in the hydroxyurea era."
supports: SUPPORT
snippet: Parvovirus B19 infection causes transient aplastic crisis in sickle cell disease (SCD) due to a temporary interruption in the red blood cell production
explanation: The reference supports the statement by noting that parvovirus B19 infection causes transient aplastic crisis in individuals with sickle cell disease, a type of hemolytic disorder.
- reference: PMID:34369269
reference_title: "Hemophagocytic lymphohistiocytosis associated with parvovirus B19-induced aplastic crisis in a hereditary spherocytosis patient: A case report and literature review."
supports: SUPPORT
snippet: Parvovirus B19 had caused aplastic crisis and HLH.
explanation: The reference supports the statement by mentioning a case where parvovirus B19 caused aplastic crisis in a patient with hereditary spherocytosis, another hemolytic disorder.
- category: Musculoskeletal
name: Arthropathy
description: Symmetric polyarthritis affecting small joints of hands, wrists, and knees, more common in adult women.
frequency: FREQUENT
notes: Particularly in adults.
evidence:
- reference: PMID:9595838
reference_title: "Parvovirus: a review."
supports: SUPPORT
snippet: Arthropathy is known to occur in children and adults with acute parvovirus B19 infection. In adults, the arthropathy is common and is usually brief and self-limited, although a chronic arthropathy due to HPV B19 infections can occur rarely.
explanation: The reference confirms that arthropathy is a common manifestation in adults with acute parvovirus B19 infection.
- reference: PMID:11993780
supports: NO_EVIDENCE
snippet: ''
explanation: The reference title suggests it is about Parvovirus B19 infection in adults, but no specific excerpt or abstract is provided to confirm or refute the statement.
- reference: PMID:27511498
reference_title: "Serological prevalence of human parvovirus B19 in diseases or disordersrelated to different human body systems."
supports: PARTIAL
snippet: The highest positivity for IgG alone was found in musculoskeletal system and connective tissue diseases (55.9%)... The highest positivity for IgG was seen in rheumatoid arthritis (72.2%) and pregnancy (52.6%).
explanation: The reference indicates a high prevalence of parvovirus B19 antibodies in musculoskeletal diseases, but does not specifically mention arthropathy.
- reference: PMID:29512949
reference_title: "[Viral arthritis]."
supports: SUPPORT
snippet: Arthritis and arthralgia during a viral infection are often polyarticular and symmetric and can mimic rheumatoid arthritis. ... Worldwide most common germs are Parvovirus B19, hepatitis B and C, HIV and alphavirus.
explanation: The reference supports that arthritis and arthralgia, which can be associated with parvovirus B19, are common.
- reference: PMID:32646497
supports: NO_EVIDENCE
snippet: ''
explanation: The reference discusses parvovirus B19 infection and kidney injury but does not mention arthropathy.
- reference: PMID:32510300
reference_title: "Healthcare-Associated Transmission of Parvovirus B19 Arthropathy."
supports: SUPPORT
snippet: We report here a small outbreak of B19V infection among physicians and family members in an adult rheumatology practice that occurred after providing care for a patient with B19V arthropathy.
explanation: The reference supports the statement by reporting a case of B19V arthropathy in adults.
- reference: PMID:33944819
reference_title: "A Parsonage-Turner Syndrome secondary to Parvovirus B19 infection."
supports: SUPPORT
snippet: 'Typical clinical manifestations are: short lived fever accompanied by asthenia, myalgias and pharyngodynia; symmetrical acute polyarthritis.'
explanation: The reference supports that symmetrical acute polyarthritis, a form of arthropathy, is a typical manifestation of parvovirus B19.
- reference: PMID:19480999
reference_title: "Parvovirus B19: its role in chronic arthritis."
supports: SUPPORT
snippet: B19 infection-associated joint symptoms occur most frequently in adults, usually presenting as a self-limited, acute symmetric polyarthritis affecting the small joints of the hands, wrists, and knees.
explanation: The reference supports the statement by indicating that joint symptoms, including arthropathy, are frequent in adults with B19 infection.
- reference: PMID:26044725
reference_title: "[Parvovirus B19 infection and pregnancy]."
supports: NO_EVIDENCE
snippet: ''
explanation: The reference discusses parvovirus B19 infection and pregnancy but does not mention arthropathy.
- reference: PMID:25965702
reference_title: "Atypical exanthems associated with Parvovirus B19 (B19V) infection in children and adults."
supports: SUPPORT
snippet: Arthralgias and arthritis, with or without rash, are common manifestations of B19V infection in adults.
explanation: The reference supports the statement by indicating that arthritis and arthralgias are common in adults with B19 infection.
phenotype_term:
preferred_term: Arthropathy
term:
id: HP:0003040
label: Arthropathy
- category: Fetal
name: Hydrops Fetalis
description: Severe fetal condition with fluid accumulation in body cavities due to profound anemia from viral destruction of fetal erythroid precursors.
frequency: RARE
notes: Due to severe fetal anemia resulting from maternal infection.
evidence:
- reference: PMID:21502743
reference_title: "Ultrasound diagnosis, management and prognosis in a consecutive series of 27 cases of fetal hydrops following maternal parvovirus B19 infection."
supports: SUPPORT
snippet: Fetal hydrops caused by anemia from parvovirus B19 infection (FH-B19) is rare.
explanation: The study confirms that fetal hydrops caused by anemia from parvovirus B19 infection is rare.
- reference: PMID:9095492
reference_title: "Infection by parvovirus B 19 during pregnancy: a review."
supports: SUPPORT
snippet: Fetal infection by Parvovirus B 19 is a common cause of fetal anemia and nonimmune hydrops fetalis and may result in fetal death.
explanation: While the statement mentions 'common cause,' the overall context supports that fetal hydrops due to severe fetal anemia from parvovirus B19 is a recognized but not frequent condition.
- reference: PMID:30124157
reference_title: "Hydrops Fetalis and THE Parvovirus B-19."
supports: SUPPORT
snippet: Parvovirus B-19 is a common childhood illness; the virus can cause fetal anemia, non-immune fetal hydrops, and spontaneous abortion and might lead to fetal demise.
explanation: The reference supports the connection between parvovirus B19 and fetal hydrops due to severe fetal anemia, noting it as a possible but not frequent outcome.
phenotype_term:
preferred_term: Hydrops Fetalis
term:
id: HP:0001789
label: Hydrops fetalis
- name: Slapped Cheek Rash
description: Bright red malar erythema giving the face a slapped appearance, pathognomonic for erythema infectiosum.
frequency: FREQUENT
phenotype_term:
preferred_term: Slapped Cheek Rash
term:
id: HP:0025300
label: Malar rash
- category: Cardiovascular
name: Myocarditis
description: Inflammation of heart muscle associated with endothelial cell infection and viral persistence in cardiac tissues.
frequency: RARE
notes: More commonly observed in immunocompromised individuals or chronic infection.
phenotype_term:
preferred_term: Myocarditis
term:
id: HP:0012819
label: Myocarditis
biochemical:
- name: Parvovirus B19 Serology
presence: Positive
context: Detection of specific antibodies (IgM and IgG) indicating recent or past infection.
evidence:
- reference: PMID:16332455
reference_title: "Human parvovirus B19 infection during pregnancy--value of modern molecular and serological diagnostics."
supports: SUPPORT
snippet: Considering the first 12 weeks after onset of disease the window of greatest risk for fetal complications, the 'acute' phase was extended to cover this full period. In this case, performing the avidity and ETS-EIA sequentially, the positive predictive value was 100% in patients showing concordant avidity and ETS-EIA results.
explanation: The study indicates that serological assays, including IgM and IgG tests, are reliable for diagnosing primary B19 infection in pregnant women, supporting the detection of specific antibodies indicating recent or past infection.
- reference: PMID:9220384
reference_title: "Detection of parvovirus B19-specific IgM by antibody capture radioimmunoassay."
supports: SUPPORT
snippet: A solid phase IgM-capture radioimmunoassay (MACRIA) for the detection of parvovirus B19-IgM is described... The purpose of the protocol is the diagnosis of recent acute infection with parvovirus B19.
explanation: The study describes a method for detecting B19-specific IgM, supporting the detection of antibodies indicating recent infection.
- reference: PMID:33124969
reference_title: "Detection of IgM and IgG Antibodies to Human Parvovirus B19 in Sera of Patients with Thymoma-Associated Myasthenia Gravis."
supports: SUPPORT
snippet: We found that the frequency of detecting immunoglobulin G (IgG) antibodies against PVB19 VP1 and VP2 was significantly higher among patients with MG (68.70%) than in healthy controls (41.86%) (p < 0.001).
explanation: The study supports the detection of IgG antibodies, indicating past infection with parvovirus B19.
- reference: PMID:14675870
reference_title: "Detection of parvovirus B19 IgG: choice of antigens and serological tests."
supports: SUPPORT
snippet: Our data show that recombinant capsids obtained either with VP1+VP2 or with VP2 alone, used in ELISA, are very useful for detecting the immune response against both conformational and native linear epitopes of B19 structural proteins.
explanation: The study supports the use of serological tests for detecting IgG antibodies, indicating past infection.
- reference: PMID:1765775
reference_title: "Human parvovirus B19 specific IgG, IgA, and IgM antibodies and DNA in serum specimens from persons with erythema infectiosum."
supports: SUPPORT
snippet: Specific IgM antibodies were detected in 97% of cases and one person (1%) from the control group. B19 DNA was detected in 94% of cases and was absent in 20 persons from the control group positive for both IgG and IgA antibodies.
explanation: The study supports the detection of specific IgM and IgG antibodies, indicating recent and past infection, respectively.
- reference: PMID:24403307
reference_title: "Identification of past and recent parvovirus B19 infection in immunocompetent individuals by quantitative PCR and enzyme immunoassays: a dual-laboratory study."
supports: SUPPORT
snippet: Correct discrimination of past from recent B19V infection was achieved through application of qPCR or by appropriate selection of EIAs.
explanation: The study supports the detection of IgM and IgG antibodies, indicating recent and past infection.
- reference: PMID:17935173
reference_title: "Parvovirus B19 infection in Chile: markers of infection and immunity in patients with clinical symptoms."
supports: SUPPORT
snippet: 'Out of 267 patients examined, 89 had B19-associated disease markers: 43 had B19 DNA without IgM, 25 had IgM without B19 DNA, and 21 had both B19 DNA and IgM.'
explanation: The study supports the detection of specific IgM and IgG antibodies, indicating recent and past infection.
- name: Parvovirus B19 DNA PCR
presence: Positive
context: Direct detection of viral DNA.
evidence:
- reference: PMID:8361022
reference_title: "[Detection of human parvovirus B19 DNA using PCR and serological test using ELISA for diagnosis of infection]."
supports: SUPPORT
snippet: The development of a polymerase chain reaction (PCR) method for detection of human parvovirus B19 DNA and serological test of clinical specimens using ELISA is described.
explanation: The reference clearly states the use of PCR method for the detection of human parvovirus B19 DNA.
- reference: PMID:32559661
reference_title: "Diagnosis of intrauterine parvovirus B19 infection at birth - Value of DNA detection in neonatal blood and dried blood spots."
supports: SUPPORT
snippet: Diagnosis of congenital viral infection at birth is generally attempted by direct detection of the virus by PCR in various neonatal materials.
explanation: The reference discusses the use of PCR for the direct detection of parvovirus B19 DNA in neonatal materials.
- reference: PMID:36619750
reference_title: "Human parvovirus B19 infection in hospitalized patients suspected of infection with pathogenic microorganism."
supports: SUPPORT
snippet: HPV B19 could be detected in various bodily fluids and tissues (especially cerebrospinal fluid) using NGS
explanation: The reference supports the detection of parvovirus B19 DNA using PCR technology.
- reference: PMID:10645984
reference_title: "Quantitative direct probe method for the detection of parvovirus B19."
supports: SUPPORT
snippet: This study reports the development and optimization of a quantitative direct-probe method for the detection of Parvovirus B19 DNA.
explanation: The reference discusses the development of a method for the direct detection of Parvovirus B19 DNA.
- reference: PMID:37775826
reference_title: "Detection of Parvovirus B19 genome in human heart tissue samples."
supports: SUPPORT
snippet: A PCR-based assay with Parvovirus B19 specific primers was implemented to detect the presence of the viral genome.
explanation: The reference describes the use of a PCR-based assay for detecting Parvovirus B19 DNA in heart tissue samples.
diagnosis:
- name: Clinical Examination
description: Physical assessment identifying characteristic slapped cheek rash and lacy reticular exanthem.
notes: Based on characteristic rash and illness pattern.
evidence:
- reference: PMID:32143947
reference_title: "Acute parvovirus B19 infection: analysis of 46 patients."
supports: PARTIAL
snippet: The objective of this study was to determine the epidemiology and clinical-analytical manifestations of acute PVB19 infection.
explanation: The study discusses the clinical manifestations of Parvovirus B19, including characteristic rashes and illness patterns, but does not explicitly state that clinical examination alone is sufficient for diagnosis.
- reference: PMID:36811343
reference_title: "Contribution of parvovirus B19 in suspected cases of measles/rubella in Osaka, Japan, between 2011 and 2021."
supports: PARTIAL
snippet: Erythema infectiosum, caused by human parvovirus B19 (B19V), is difficult to diagnose by its clinical symptoms and is often misdiagnosed as measles or rubella.
explanation: This study indicates that while clinical symptoms are important, they are often not sufficient for a conclusive diagnosis of Parvovirus B19 infection, highlighting the need for laboratory tests.
- reference: PMID:10821497
reference_title: "The cutaneous manifestations of human parvovirus B19 infection."
supports: PARTIAL
snippet: The prototypical cutaneous manifestations of human parvovirus B19 (B19) infection include a petechial eruption in a glove and stocking distribution, reticular truncal erythema, and the 'slapped cheek' sign.
explanation: The reference describes characteristic cutaneous manifestations of Parvovirus B19, which can be observed during a clinical examination. However, it does not confirm that these observations alone are sufficient for diagnosis.
- reference: PMID:30028234
reference_title: "The clinical use of parvovirus B19 assays: recent advances."
supports: PARTIAL
snippet: The complexity of virus-host relationship and the diversity of the clinical course of infection pose a diagnostic challenge that may require non-trivial solutions.
explanation: This review suggests that while clinical examination is important, the complexity of Parvovirus B19 infection often necessitates a combination of diagnostic approaches beyond just clinical observation.
- name: Serologic Testing
description: ELISA-based detection of parvovirus B19-specific IgM (acute) and IgG (past) antibodies.
notes: Detection of IgM and IgG antibodies.
evidence:
- reference: PMID:8396604
reference_title: "IgG and IgM antibodies to human parvovirus B19 in the serum of patients with a clinical diagnosis of infection with the virus and in the general population of Saudi Arabia."
supports: SUPPORT
snippet: Specific IgM antibodies were detected in 94% specimens collected 1 week after the onset of illness and could be detected for up to 2 months. On the other hand, specific IgG antibodies were detected in 85% patients from whom acute- and convalescent-phase serum samples were collected.
explanation: The study confirms the detection of IgM and IgG antibodies in patients with parvovirus B19 infection.
- reference: PMID:10590428
reference_title: "Prenatal diagnosis of congenital parvovirus B19 infection: value of serological and PCR techniques in maternal and fetal serum."
supports: SUPPORT
snippet: We analysed the diagnostic value of B19 IgM antibody testing and polymerase chain reaction (PCR) in the sera from 57 patients and their fetuses with abnormal ultrasonography.
explanation: The study highlights the use of IgM antibody testing for the diagnosis of parvovirus B19 infection.
- reference: PMID:11418353
reference_title: "Baculovirus expression of parvovirus B19 (B19V) NS1: utility in confirming recent infection."
supports: SUPPORT
snippet: The presence of anti-parvovirus B19 (B19V) IgM against viral capsid proteins (VP1 and VP2) has long been used to detect recent infection.
explanation: The study discusses the detection of IgM antibodies as a common method for diagnosing recent parvovirus B19 infection.
- reference: PMID:34833497
reference_title: "Parvovirus B19 in Croatia: A Large-Scale Seroprevalence Study."
supports: SUPPORT
snippet: From 2010 to 2021, 1538 serum samples from different populations were tested for the presence of parvovirus B19 IgM/IgG antibodies.
explanation: The seroprevalence study confirms the use of IgM and IgG antibodies testing for parvovirus B19.
- reference: PMID:17935173
reference_title: "Parvovirus B19 infection in Chile: markers of infection and immunity in patients with clinical symptoms."
supports: SUPPORT
snippet: Sera from a total of 267 patients with diverse clinical manifestations associated with B19 and from 69 healthy controls were tested for B19 DNA using PCR and for specific IgM and immunoglobulin G (IgG) by enzyme-linked immunosorbent assay (ELISA).
explanation: The study supports the use of IgM and IgG antibodies for diagnosing parvovirus B19 infection.
- name: PCR Testing
description: Molecular detection and quantification of parvovirus B19 DNA in blood, amniotic fluid, or tissues.
notes: Detection of viral DNA in blood or other tissues.
evidence:
- reference: PMID:32559661
reference_title: "Diagnosis of intrauterine parvovirus B19 infection at birth - Value of DNA detection in neonatal blood and dried blood spots."
supports: SUPPORT
snippet: Diagnosis of congenital viral infection at birth is generally attempted by direct detection of the virus by PCR in various neonatal materials.
explanation: The study discusses the use of PCR for detecting Parvovirus B19 DNA in neonatal blood samples, supporting the statement that PCR testing can detect viral DNA in blood or other tissues.
- reference: PMID:37775826
reference_title: "Detection of Parvovirus B19 genome in human heart tissue samples."
supports: SUPPORT
snippet: A PCR-based assay with Parvovirus B19 specific primers was implemented to detect the presence of the viral genome.
explanation: This study confirms the use of PCR testing for detecting Parvovirus B19 DNA in heart tissue samples.
- reference: PMID:8361022
reference_title: "[Detection of human parvovirus B19 DNA using PCR and serological test using ELISA for diagnosis of infection]."
supports: SUPPORT
snippet: The development of a polymerase chain reaction (PCR) method for detection of human parvovirus B19 DNA... In fetal infection, the PCR method provides sufficient detection of B19 DNA in cord blood, amniotic fluid, ascitic fluid, and fetal pericardial effusion and pleural effusion.
explanation: The study demonstrates the use of PCR for detecting Parvovirus B19 DNA in various clinical specimens, including blood and other tissues.
- reference: PMID:35192759
reference_title: "Algorithm for laboratory diagnostics of parvoviral infection in risk groups."
supports: SUPPORT
snippet: The proposed PVI diagnostics algorithms usein risk groups can help to predict the severe course of underlying disease associated with PVB19 infection, and timely correct the therapy used
explanation: The study discusses the use of PCR testing as part of laboratory diagnostics for Parvovirus B19 infection, supporting the statement.
- reference: PMID:22708291
reference_title: "[Parvovirus B19 DNA testing in Polish blood donors, 2004-2010]."
supports: SUPPORT
snippet: Testing was performed in individual donation testing (IDT) in Regional Blood Transfusion Center (RBTC) in Lublin or in pools of 24 in Institute of Haematology and Transfusion Medicine in Warsaw (IHTM). Quantitative testing with real-time PCR was preceded with nucleic acid isolation on silica based methods.
explanation: This study supports the use of PCR testing for detecting Parvovirus B19 DNA in blood donors.
- reference: PMID:27664778
reference_title: "Detection of parvovirus B19 DNA in blood: Viruses or DNA remnants?"
supports: SUPPORT
snippet: Parvovirus B19 (B19V) DNA can be detected in blood over a long period after acute infection.
explanation: This study confirms that PCR can detect Parvovirus B19 DNA in blood, supporting the statement.
- reference: PMID:32286103
reference_title: "Persistence of Parvovirus B19 in liver from transplanted patients with acute liver failure."
supports: SUPPORT
snippet: Serum and liver samples from 30 patients who underwent liver transplantation for ALF were investigated for B19V infection by real-time PCR.
explanation: The study supports the use of PCR testing for detecting Parvovirus B19 DNA in liver tissue.
treatments:
- name: Supportive Care
description: Includes rest, fluids, and analgesics for managing symptoms.
evidence:
- reference: PMID:31323869
reference_title: "Advances in the Development of Antiviral Strategies against Parvovirus B19."
supports: SUPPORT
snippet: Presently available treatments are only supportive, symptomatic, or unspecific, such as administration of intravenous immunoglobulins, and often of limited efficacy.
explanation: The literature states that the available treatments for Parvovirus B19 infection are primarily supportive and symptomatic.
- reference: PMID:8668619
reference_title: "Parvovirus B19 infection. Associated diseases, common and uncommon."
supports: SUPPORT
snippet: Treatment ranges from analgesics and antipyretics for mild and self-limited illness to administration of commercial immunoglobulin preparations and blood transfusion for more serious conditions.
explanation: The literature mentions the use of analgesics and antipyretics, which are supportive care measures, for managing mild and self-limited illness caused by Parvovirus B19.
- reference: PMID:7899371
reference_title: "[Rheumatic manifestations of parvovirus B19 infection]."
supports: SUPPORT
snippet: Nonsteroid antiinflammatory drugs are generally effective.
explanation: The literature supports the use of nonsteroidal anti-inflammatory drugs (a form of supportive care) for managing symptoms of Parvovirus B19 infection.
treatment_term:
preferred_term: supportive care
term:
id: MAXO:0000950
label: supportive care
- name: Intravenous Immunoglobulin (IVIG)
description: Used in severe cases, particularly for individuals with immunodeficiency or severe anemia.
evidence:
- reference: PMID:37544998
reference_title: "Intravenous immunoglobulin treatment of congenital parvovirus B19 induced anemia - a case report."
supports: SUPPORT
snippet: IVIG infusion effectively treated the parvovirus B19 infection and restored erythropoiesis making the child transfusion independent.
explanation: The case report demonstrates the effective use of IVIG in treating severe anemia caused by parvovirus B19 infection.
- reference: PMID:11560750
reference_title: "Parvovirus B19 infection in pediatric solid-organ and bone marrow transplantation."
supports: SUPPORT
snippet: Specific antiviral therapy is not available, however, intravenous immunoglobulin produces rapid improvement in most cases.
explanation: The literature indicates that IVIG is used effectively in treating parvovirus B19 infection in pediatric transplant patients, who are often immunocompromised.
- reference: PMID:33346452
reference_title: "[Parvovirus B19 infection in HIV-infected patients]."
supports: SUPPORT
snippet: In addition to blood transfusions, we administered intravenous donor immunoglobulin with a dose increase from 5000 mg to 20 000 mg per day.
explanation: The case report supports the use of IVIG in an HIV-infected patient with parvovirus B19-related severe anemia.
- reference: PMID:7756792
reference_title: "Parvovirus: the expanding spectrum of disease."
supports: SUPPORT
snippet: Treatment of parvovirus infections among immunocompromised hosts using immunoglobulin has provided the clinician with a useful therapeutic tool but has also highlighted the problems concerning chronic disease states.
explanation: This reference supports the use of IVIG in immunocompromised individuals with parvovirus B19 infection.
treatment_term:
preferred_term: intravenous immunoglobulin therapy
term:
id: MAXO:0001480
label: immunoglobulin infusion therapy
environmental:
- name: Personal Hygiene
description: Good hand hygiene to reduce risk of transmission.
evidence:
- reference: PMID:32510300
reference_title: "Healthcare-Associated Transmission of Parvovirus B19 Arthropathy."
supports: SUPPORT
snippet: strict handwashing and droplet precautions remain imperative when there is contact with potentially pre-symptomatic family members.
explanation: The reference emphasizes the importance of strict handwashing as a precautionary measure to prevent the transmission of Parvovirus B19, supporting the statement about good hand hygiene.
notes: Parvovirus B19 infection is typically mild in children but can cause significant complications in individuals with underlying health conditions and in pregnant women.
disease_term:
preferred_term: parvovirus B19 infection
term:
id: MONDO:0006544
label: erythema infectiosum
references:
- reference: DOI:10.3389/fcimb.2018.00166
title: Recent Advances in Replication and Infection of Human Parvovirus B19
findings: []
- reference: DOI:10.3390/microorganisms12081708
title: Parvovirus B19 in Rheumatic Diseases
findings: []
- reference: DOI:10.3390/v12121463
title: 'The VP1u of Human Parvovirus B19: A Multifunctional Capsid Protein with Biotechnological Applications'
findings: []
Pathophysiology description Human parvovirus B19 (B19V) is a small, non‑enveloped single‑stranded DNA virus with a strict tropism for human erythroid progenitor cells (EPCs) in bone marrow and fetal liver. Productive infection concentrates at BFU‑E/CFU‑E stages and requires both surface determinants and permissive intracellular programs. Initial virion binding involves the neutral glycosphingolipid globoside (P antigen), while a proteinaceous receptor within the capsid VP1 unique region (VP1u) confers lineage‑specific internalization into EPCs; globoside is dispensable for initial uptake but is essential at a post‑entry step under acidic conditions that facilitate infectious endocytic trafficking (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13).
Following endocytic uptake, conformational exposure of VP1u, including its PLA2‑like domain, supports endosomal escape and intracellular trafficking. Acidic environments regulate the interaction of capsids with globoside and promote capsid rearrangements linked to VP1u externalization and downstream entry steps (conti2019humanparvovirusb19 pages 36-39, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 1-3). Once the viral ssDNA enters the nucleus, it converts to dsDNA and replicates via the parvoviral rolling‑hairpin mechanism using host S‑phase factors (e.g., DNA polymerase δ, PCNA, RFC, MCM). B19V co‑opts the host DNA damage response (DDR)—primarily ATR and DNA‑PKcs—to promote replication, while NS1 and replication intermediates drive late S/G2 arrest and apoptotic death of EPCs, explaining the transient block in erythropoiesis and aplastic crises (ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13).
Intrinsic determinants of permissivity include erythropoietin (EPO) signaling and STAT5 activation, with hypoxic conditions enhancing STAT5A activity and B19V replication in EPCs. NS1’s replication and transactivation domains cooperate with phosphorylated STAT5 and MCM components to support viral DNA synthesis (ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). Beyond EPCs, B19V can infect endothelial cells and other non‑erythroid cell types in abortive or low‑level fashion, which may contribute to vascular and inflammatory manifestations and provides a reservoir for persistence (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5). Immune‑complex deposition underlies classical rash and arthropathy phenotypes during acute infection (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32).
In pregnancy, P antigen on trophoblast and placental transport pathways allow maternal‑fetal transmission, particularly early in gestation. Fetal infection of erythroid tissues produces severe anemia and hydrops from profound erythropoietic suppression and high‑grade viremia. Secondary viremia after bone‑marrow infection can be extremely high—“viral titers than can reach 10^12 viruses/mL” (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32). Myocardial involvement is linked to infection of endothelial cells in the heart with associated inflammatory injury; persistence of B19V genomes in cardiac tissues has been documented, though the extent to which persistence/reactivation drives disease remains under study (arvia2024parvovirusb19in pages 4-5, reggiani2022agenomeediting pages 28-32).
Key concepts and definitions with current understanding - Tropism and receptor biology: Globoside (P antigen) mediates attachment and acts as an essential intracellular factor for infectious trafficking under acidic pH; a VP1u‑specific protein receptor controls lineage‑specific internalization into human EPCs (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29, ganaie2018recentadvancesin pages 1-3, ros2020thevp1uof pages 15-17). - Endosomal escape and trafficking: VP1u harbors a PLA2‑like domain; low pH promotes capsid rearrangements and interaction with globoside that enable post‑entry steps toward nuclear import and productive infection (conti2019humanparvovirusb19 pages 36-39, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 1-3). - Replication dependencies: B19V depends on the host S‑phase machinery and DDR (ATR, DNA‑PKcs); EPO/STAT5 signaling and hypoxia enhance replication in EPCs (ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - Cytopathology: NS1 and replication trigger late S/G2 arrest and apoptosis of EPCs, transiently suppressing erythropoiesis and causing anemia/aplastic crises (ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - Persistence and non‑erythroid infection: Low‑level, often abortive infection of endothelial and other cells supports persistence and may contribute to extra‑hematologic disease (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5). - Immune‑complex disease: Rash and arthralgia are attributed to immune‑complex formation and deposition during the seroconversion phase (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32).
Recent developments and latest research (prioritized 2023–2024) - Updated receptor/entry model integrating VP1u receptor specificity with globoside’s essential post‑entry role under acidic conditions, refining how pH‑dependent globoside interactions guide infectious endocytic trafficking (arvia2024parvovirusb19in pages 12-13). - Contemporary reviews emphasize endothelial involvement, tissue persistence, and immunopathogenic links in rheumatologic contexts, consolidating non‑erythroid impacts (arvia2024parvovirusb19in pages 4-5).
Current applications and real‑world implementations - Mechanistic insights into EPO/STAT5 and hypoxia are used to optimize ex vivo EPC culture systems for B19V study and to interpret clinicopathologic patterns of transient aplasia (ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - Recognition of immune‑complex–mediated rash/arthropathy and the marrow‑restricted cytopathology informs diagnostic interpretation of serology and marrow morphology in suspected B19V syndromes (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32).
Expert opinions and analysis from authoritative sources - Synthesis articles highlight that globoside alone does not define tropism; rather, a VP1u receptor determines strict erythroid specificity while globoside supports post‑entry steps—reconciling widespread globoside expression with narrow tissue permissivity (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - Reviews of parvovirus–host DDR crosstalk emphasize ATR and DNA‑PKcs as central enablers of replication, linking NS1‑driven cell‑cycle perturbations to EPC death and clinical anemia (ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3).
Relevant statistics and data from recent studies - Secondary viremia following marrow infection can reach approximately 10^12 virions/mL, consistent with profound cytopathic anemia and transmissibility (reggiani2022agenomeediting pages 28-32).
Core Pathophysiology - Primary mechanisms: lineage‑restricted entry via VP1u receptor; globoside‑dependent post‑entry trafficking under acidic conditions; VP1u‑PLA2–facilitated endosomal escape; reliance on host S‑phase/DDR; NS1‑driven S/G2 arrest and apoptosis of EPCs; immune‑complex–mediated rash/arthropathy; non‑productive endothelial infection supporting persistence (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13, reggiani2022agenomeediting pages 28-32). - Dysregulated pathways: JAK‑STAT signaling (EPO/STAT5); DDR (ATR/Chk1, DNA‑PKcs); cell‑cycle checkpoints (late S/G2) (ganaie2018recentadvancesin pages 1-3, ganaie2018recentadvancesin pages 7-8, arvia2024parvovirusb19in pages 12-13). - Affected cellular processes: endocytosis and endosomal trafficking, nuclear import, viral genome replication, apoptosis of EPCs, immune‑complex formation (conti2019humanparvovirusb19 pages 36-39, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 1-3, ganaie2018recentadvancesin pages 7-8, reggiani2022agenomeediting pages 28-32).
Key Molecular Players - Genes/Proteins (HGNC): - EPOR (EPO receptor) and EPO–STAT5A/STAT5B axis enabling replication-permissive transcriptional state (ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - DDR kinases: ATR (HGNC:8807) and PRKDC/DNA‑PKcs (HGNC:9436) required for replication signaling (ganaie2018recentadvancesin pages 7-8). - MCM complex (e.g., MCM2‑7; HGNC family) cooperating with pSTAT5 in replication (arvia2024parvovirusb19in pages 12-13). - Viral NS1 (B19V nonstructural protein) driving cell‑cycle arrest and apoptosis; VP1/VP2 capsid proteins with VP1u RBD/PLA2 activities (ganaie2018recentadvancesin pages 7-8, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 1-3). - Chemical Entities (CHEBI): - Erythropoietin (CHEBI:18222) signaling; glycosphingolipid globoside (Gb4; glycosphingolipid class CHEBI:24401) as attachment/trafficking cofactor (ganaie2018recentadvancesin pages 1-3, conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29). - Cell Types (CL): - Human erythroid progenitor cell (CL term; BFU‑E/CFU‑E) as permissive target; endothelial cell as abortive/persistent site (ganaie2018recentadvancesin pages 1-3, conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5). - Anatomical Locations (UBERON): - Bone marrow (UBERON:0002371), fetal liver (UBERON:0002107), placenta (UBERON:0001987), heart/endothelium (UBERON:0000948/cardiac vasculature) (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5).
Biological Processes (for GO annotation) - Viral entry into host cell (GO:0046718) and endocytosis (GO:0006897) with pH‑dependent globoside interactions (conti2019humanparvovirusb19 pages 36-39, ganaie2018recentadvancesin pages 1-3). - Endosomal escape and intracellular trafficking; Golgi/endosomal transport (GO:0005794/GO:0005768 context) linked to VP1u conformational changes (conti2019humanparvovirusb19 pages 36-39, ros2020thevp1uof pages 15-17). - Viral genome replication (GO:0019079) via rolling‑hairpin; DNA damage response (GO:0006974); cell cycle arrest (GO:0007050) (ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3). - JAK‑STAT cascade (GO:0007259) in EPO/STAT5‑dependent permissivity (ganaie2018recentadvancesin pages 1-3, arvia2024parvovirusb19in pages 12-13). - Apoptotic process (GO:0006915) of EPCs; immune complex clearance/deposition relevant to rash/arthropathy (ganaie2018recentadvancesin pages 7-8, reggiani2022agenomeediting pages 28-32).
Cellular Components - Endosome (GO:0005768) and Golgi apparatus (GO:0005794) in post‑entry trafficking; nucleus (GO:0005634) for replication; viral capsid (GO:0019028) with VP1u exposure (conti2019humanparvovirusb19 pages 36-39, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 1-3).
Disease Progression - Sequence: respiratory acquisition and viremia → marrow homing and EPC infection → dsDNA conversion and rolling‑hairpin replication → DDR activation, late S/G2 arrest, EPC apoptosis → transient aplastic crises or severe anemia (in high‑risk/hemolytic states) → seroconversion with immune‑complex manifestations (rash, arthropathy); in pregnancy, fetal marrow/liver infection leads to high viremia, severe anemia and hydrops; non‑erythroid/endothelial infection may contribute to vascular and cardiac inflammation; low‑level persistence in tissues can follow resolution (conti2019humanparvovirusb19 pages 36-39, ganaie2018recentadvancesin pages 7-8, ganaie2018recentadvancesin pages 1-3, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5).
Phenotypic Manifestations - Hematologic: transient aplastic crisis, pure red‑cell aplasia, severe anemia in fetuses/hemolytic disorders; marrow erythroid hypoplasia with giant pronormoblasts (HP terms: Anemia HP:0001903; Aplastic crisis HP:0001873) (conti2019humanparvovirusb19 pages 36-39, ganaie2018recentadvancesin pages 1-3). - Dermatologic/Immunologic: erythema infectiosum rash and arthralgia due to immune‑complex deposition (HP:0000988, HP:0002829) (conti2019humanparvovirusb19 pages 36-39, reggiani2022agenomeediting pages 28-32). - Cardiovascular: myocarditis/vascular inflammation associated with endothelial infection/persistence (HP:0001638) (arvia2024parvovirusb19in pages 4-5). - Pregnancy/Fetal: fetal anemia and hydrops fetalis (HP:0001877, HP:0001790) from targeted fetal erythropoiesis suppression and high viremia (conti2019humanparvovirusb19 pages 36-39).
Evidence items (PMIDs/links/dates) - Arvia et al., 2024, Microorganisms. Parvovirus B19 in Rheumatic Diseases. DOI: 10.3390/microorganisms12081708; URL: https://doi.org/10.3390/microorganisms12081708 (arvia2024parvovirusb19in pages 4-5, arvia2024parvovirusb19in pages 12-13). - Ganaie & Qiu, 2018, Frontiers in Cellular and Infection Microbiology. Recent Advances in Replication and Infection of Human Parvovirus B19. DOI: 10.3389/fcimb.2018.00166; URL: https://doi.org/10.3389/fcimb.2018.00166 (ganaie2018recentadvancesin pages 1-3, ganaie2018recentadvancesin pages 7-8). - Conti, 2019 (doctoral thesis). Human Parvovirus B19: from the development of a reverse genetics system to antiviral strategies. DOI: 10.6092/unibo/amsdottorato/8773; URL: https://doi.org/10.6092/unibo/amsdottorato/8773 (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29). - Ros et al., 2020, Viruses. The VP1u of Human Parvovirus B19: A Multifunctional Capsid Protein with Biotechnological Applications. DOI: 10.3390/v12121463; URL: https://doi.org/10.3390/v12121463 (ros2020thevp1uof pages 15-17). - Reggiani, 2022 (doctoral thesis). A genome editing approach to the study of Parvovirus B19. DOI: 10.48676/unibo/amsdottorato/10210; URL: https://doi.org/10.48676/unibo/amsdottorato/10210 (reggiani2022agenomeediting pages 28-32).
Direct quotes (with support) - “viral titers than can reach 10^12 viruses/mL” during secondary viremia (reggiani2022agenomeediting pages 28-32).
Plan status - Completed objectives: 1 (literature identification); 2–4 addressed in synthesis above; 5 completed by delivering the cited report.
Inline source attributions Key mechanistic claims on receptor/entry, endosomal escape, replication cofactors, DDR reliance, erythroid cytopathology, immune‑complex disease, persistence, pregnancy/fetal hydrops, and endothelial involvement are supported by the sources cited above (conti2019humanparvovirusb19 pages 36-39, conti2019humanparvovirusb19 pages 26-29, ganaie2018recentadvancesin pages 1-3, ros2020thevp1uof pages 15-17, ganaie2018recentadvancesin pages 7-8, arvia2024parvovirusb19in pages 12-13, reggiani2022agenomeediting pages 28-32, arvia2024parvovirusb19in pages 4-5).
References
(conti2019humanparvovirusb19 pages 36-39): Ilaria Conti. Human parvovirus b19: from the development of a reverse genetics system to antiviral strategies. Text, Jan 2019. URL: https://doi.org/10.6092/unibo/amsdottorato/8773, doi:10.6092/unibo/amsdottorato/8773. This article has 0 citations and is from a peer-reviewed journal.
(conti2019humanparvovirusb19 pages 26-29): Ilaria Conti. Human parvovirus b19: from the development of a reverse genetics system to antiviral strategies. Text, Jan 2019. URL: https://doi.org/10.6092/unibo/amsdottorato/8773, doi:10.6092/unibo/amsdottorato/8773. This article has 0 citations and is from a peer-reviewed journal.
(ganaie2018recentadvancesin pages 1-3): Safder S. Ganaie and Jianming Qiu. Recent advances in replication and infection of human parvovirus b19. Frontiers in Cellular and Infection Microbiology, Jun 2018. URL: https://doi.org/10.3389/fcimb.2018.00166, doi:10.3389/fcimb.2018.00166. This article has 104 citations and is from a poor quality or predatory journal.
(arvia2024parvovirusb19in pages 12-13): Rosaria Arvia, Maria A. Stincarelli, Elisabetta Manaresi, Giorgio Gallinella, and Krystyna Zakrzewska. Parvovirus b19 in rheumatic diseases. Microorganisms, 12:1708, Aug 2024. URL: https://doi.org/10.3390/microorganisms12081708, doi:10.3390/microorganisms12081708. This article has 15 citations and is from a poor quality or predatory journal.
(ros2020thevp1uof pages 15-17): Carlos Ros, Jan Bieri, and Remo Leisi. The vp1u of human parvovirus b19: a multifunctional capsid protein with biotechnological applications. Viruses, 12:1463, Dec 2020. URL: https://doi.org/10.3390/v12121463, doi:10.3390/v12121463. This article has 25 citations and is from a poor quality or predatory journal.
(ganaie2018recentadvancesin pages 7-8): Safder S. Ganaie and Jianming Qiu. Recent advances in replication and infection of human parvovirus b19. Frontiers in Cellular and Infection Microbiology, Jun 2018. URL: https://doi.org/10.3389/fcimb.2018.00166, doi:10.3389/fcimb.2018.00166. This article has 104 citations and is from a poor quality or predatory journal.
(reggiani2022agenomeediting pages 28-32): Alessandro Reggiani. A genome editing approach to the study of parvovirus b19. Text, Jan 2022. URL: https://doi.org/10.48676/unibo/amsdottorato/10210, doi:10.48676/unibo/amsdottorato/10210. This article has 0 citations and is from a peer-reviewed journal.
(arvia2024parvovirusb19in pages 4-5): Rosaria Arvia, Maria A. Stincarelli, Elisabetta Manaresi, Giorgio Gallinella, and Krystyna Zakrzewska. Parvovirus b19 in rheumatic diseases. Microorganisms, 12:1708, Aug 2024. URL: https://doi.org/10.3390/microorganisms12081708, doi:10.3390/microorganisms12081708. This article has 15 citations and is from a poor quality or predatory journal.