Published in:
Open Access
01-12-2011 | Research article
A molecular epidemiological study of respiratory viruses detected in Japanese children with acute wheezing illness
Authors:
Asako Fujitsuka, Hiroyuki Tsukagoshi, Mika Arakawa, Kazuko Goto-Sugai, Akihide Ryo, Yoshimichi Okayama, Katsumi Mizuta, Atsuyoshi Nishina, Masakazu Yoshizumi, Yoichi Kaburagi, Masahiro Noda, Masato Tashiro, Nobuhiko Okabe, Masaaki Mori, Shumpei Yokota, Hirokazu Kimura
Published in:
BMC Infectious Diseases
|
Issue 1/2011
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Abstract
Background
Recent studies strongly suggest that some respiratory viruses are associated with the induction of acute wheezing and/or exacerbation of bronchial asthma. However, molecular epidemiology of these viruses is not exactly known.
Methods
Using PCR technology, we attempted to detect various respiratory viruses from 115 Japanese children. Furthermore, the detected viruses were subjected to homology, pairwise distance, and phylogenetic analysis.
Results
Viruses were detected from 99 (86.1%) patients. Respiratory syncytial virus (RSV) alone and human rhinovirus (HRV) alone were detected in 47 (40.9%) and 36 (31.3%) patients, respectively. Both RSV and HRV were detected in 14 (12.2%) patients. Human metapneumovirus (HMPV) alone and human parainfluenza virus (HPIV) alone were detected in 1 (0.9%) patient each, respectively. Homology and phylogenetic analyses showed that the RSV and HRV strains were classified into genetically diverse species or subgroups. In addition, RSV was the dominant virus detected in patients with no history of wheezing, whereas HRV was dominant in patients with a history of wheezing.
Conclusions
The results suggested that these genetically diverse respiratory viruses, especially RSV and HRV, might be associated with wheezing in Japanese children.