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Human Polyomaviruses in the Cerebrospinal Fluid of Neurological Patients

Overview
Journal Microorganisms
Specialty Microbiology
Date 2019 Dec 22
PMID 31861837
Citations 10
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Abstract

Background: Central nervous system (CNS) infections by human polyomaviruses (HPyVs), with the exception of JC (JCPyV), have been poorly studied.

Methods: In total, 234 cerebrospinal fluid (CSF) samples were collected from patients affected with neurological disorders. DNA was isolated and subjected to quantitative real-time PCR (Q-PCR) for the detection of six HPyVs: JCPyV, BKPyV, Merkel cell PyV (MCPyV), HPyV6, HPyV7, and HPyV9. Where possible, the molecular characterization of the viral strains was carried out by nested PCR and automated sequencing.

Results: JCPyV was detected in 3/234 (1.3%), BKPyV in 15/234 (6.4%), MCPyV in 22/234 (9.4%), and HPyV6 in 1/234 (0.4%) CSF samples. JCPyV was detected at the highest ( < 0.05) mean load (3.7 × 10 copies/mL), followed by BKPyV (1.9 × 10 copies/mL), MCPyV (1.9 × 10 copies/mL), and HPyV6 (3.3 × 10 copies/mL). The noncoding control regions (NCCRs) of the sequenced viral strains were rearranged.

Conclusions: HPyVs other than JCPyV were found in the CSF of patients affected with different neurological diseases, probably as bystanders, rather than etiological agents of the disease. However, the fact that they can be latent in the CNS should be considered, especially in immunosuppressed patients.

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