Persistent and Prolonged Parvovirus B19 Viremia in a Pediatric Patient With Acute Lymphoblastic Leukemia

Area of Science:

• Virology
• Immunology
• Hematology

Background:

• Parvovirus B19, a member of the Parvoviridae family, is a small, single-stranded DNA virus.
• It can cause diverse clinical manifestations, ranging in severity based on host factors.
• Immunocompromised individuals typically experience more severe disease and rarely persistent infections.

Observation:

• A patient undergoing maintenance therapy for acute lymphoblastic leukemia (ALL) was diagnosed with parvovirus B19.
• The patient required treatment with intravenous immunoglobulin (IVIG).
• Following chemotherapy, the patient tested positive for parvovirus B19 via polymerase chain reaction (PCR) for 27 months but remained asymptomatic.

Findings:

• The patient exhibited a prolonged, asymptomatic parvovirus B19 infection.
• Persistent viral presence was confirmed by PCR testing off chemotherapy.
• This contrasts with the typical presentation of parvovirus B19 in immunocompromised hosts.

Implications:

• This case suggests that immunocompromised patients may experience prolonged, asymptomatic parvovirus B19 infections.
• It highlights the need for careful monitoring of viral persistence in specific patient populations.
• Further research may elucidate mechanisms underlying such prolonged, subclinical viral shedding.