Journal
JOURNAL OF CLINICAL VIROLOGY
Volume 47, Issue 2, Pages 148-155Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcv.2009.11.015
Keywords
Bocavirus; Acute respiratory infection; Phylogeny; Humoral response; HBoV persistence; Co-infection
Categories
Funding
- Li Ka-Shing Foundation
- French Agency for Development (SISEA project)
- Chinese Academy of Sciences
- National Science and Technology Major Project [2009ZX10004-105]
- AREVA Foundation
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Background: Human bocavirus (HBoV), a recently discovered virus, is prevalent among children with respiratory tract infection throughout the world. Co-infection was frequently found in HBoV-positive patients. Thus, whether HBoV is responsible for the respiratory disease is still arguable. Objectives: A comprehensive study was carried out to integrate clinical and virological prevalence in HBoV-positive outpatient children, and to determine genetic and serologic characteristics of HBoV in Shanghai, China. Study design: Nasal/throat swabs and sera were obtained over a 2-year period from 817 children with respiratory tract infection to examine the presence of HBoV and its co-infection. The seroepidemiology of HBoV was studied by ELISA and Western blot against the capsid protein VP2-based fragment. Persistence of HBoV was also analyzed in 12 pairs of return-visit cases. Results: HBoV was identified in 96 samples (11.8%). The co-infection rate with other respiratory viruses was 51%. IgM was detected in 55.7% of HBoV RT-PCR-positive patients, and in 72.7% of those who had high viral genome load. In addition, persistent viral DNA positivity was detected in 10 of 12 HBoV-positive cases tested, an average of 14 days later, and one child was still HBoV-positive after 31 days. Conclusion: HBoV was found frequently in children with respiratory tract symptoms associated with other respiratory viruses, and persisted in the respiratory tract and in serum and urine. The presence of IgM was significantly more prevalent in viremic patients and those diagnosed with high load of HBoV DNA in nasal/throat swabs. (C) 2009 Elsevier B. V. All rights reserved.
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