Human Bocavirus and Acute Wheezing in Children

• Published in: Clinical infectious diseases Vol. 44; no. 7; pp. 904 - 910
• Main Authors: Allander, Tobias, Jartti, Tuomas, Gupta, Shawon, Niesters, Hubert G. M., Lehtinen, Pasi, üsterback, Riikka, Vuorinen, Tytti, Waris, Matti, Bjerkner, Annelie, Tiveljung-Lindell, Annika, van den Hoogen, Bernadette G., Hyypiä, Timo, Ruuskanen, Olli
• Format: Journal Article
• Language: English
• Published: United States The University of Chicago Press 01-04-2007; University of Chicago Press; Oxford University Press
• Subjects: Acute Disease; Adrenal Cortex Hormones - therapeutic use; and Commentaries; Articles and Commentaries; Base Sequence; Bocavirus - isolation & purification; Child; Child, Preschool; Children; Children & youth; DNA, Viral - analysis; Etiology; Female; Finland; Follow-Up Studies; Hospitalization; Human bocavirus; Humans; Infant; Infections; Male; Medicin och hälsovetenskap; Molecular Sequence Data; Nasopharynx; Parvoviridae Infections - diagnosis; Parvoviridae Infections - epidemiology; Parvovirus; Polymerase chain reaction; Prevalence; Respiratory diseases; Respiratory Sounds; Respiratory Tract Infections - diagnosis; Respiratory Tract Infections - drug therapy; Respiratory Tract Infections - virology; Reverse Transcriptase Polymerase Chain Reaction; Risk Assessment; Severity of Illness Index; Specimens; Studies; Viral load; Viruses; Wheezing; Finland
• ISSN: 1058-4838; 1537-6591; 1537-6591
• DOI: 10.1086/512196

Background. Human bocavirus is a newly discovered parvovirus. It has been detected primarily in children with acute lower respiratory tract infection, but its occurrence, clinical profile, and role as a causative agent of respiratory tract disease are not clear. Methods. We investigated the presence of human bocavirus by quantitative polymerase chain reaction of nasopharyngeal aspirate specimens and selected serum samples obtained from 259 children (median age, 1.6 years) who had been hospitalized for acute expiratory wheezing. The samples were analyzed for 16 respiratory viruses by polymerase chain reaction, virus culture, antigen detection, and serological assays. Results. At least 1 potential etiologic agent was detected in 95% of children, and >1 agent was detected in 34% of children. Human bocavirus was detected in 49 children (19%). A large proportion of the cases were mixed infections with other viruses, but human bocavirus was the only virus detected in 12 children (5%). High viral loads of human bocavirus were noted mainly in the absence of other viral agents, suggesting a causative role for acute wheezing. In addition, infections that had uncertain clinical relevance and low viral loads were prevalent. Human bocavirus DNA was frequently detected in serum specimens obtained from patients with acute wheezing, suggesting systemic infection. Conclusions. Human bocavirus is prevalent among children with acute wheezing and can cause systemic infection. Results suggest a model for bocavirus infection in which high viral loads are potentially associated with respiratory symptoms and low viral loads indicate asymptomatic shedding. Therefore, quantitative polymerase chain reaction analysis may be important for additional studies of human bocavirus.