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http://dx.doi.org/10.5352/JLS.2010.20.6.907

Genetic Characterization for Human Enterovirus Isolated from Busan Region in Korea  

Kim, Nam-Ho (Busan metropolitan City Institute of Health and Environment)
Min, Sang-Kee (Busan metropolitan City Institute of Health and Environment)
Park, Eun-Hee (Busan metropolitan City Institute of Health and Environment)
Park, Yon-Koung (Busan metropolitan City Institute of Health and Environment)
Kwan, Sun-Mok (Busan metropolitan City Institute of Health and Environment)
Jin, Seong-Hyeon (Busan metropolitan City Institute of Health and Environment)
Publication Information
Journal of Life Science / v.20, no.6, 2010 , pp. 907-913 More about this Journal
Abstract
Human enteroviruses (HEV) are considered one of the major infectious causes of central nervous system infections such as aseptic encephalomeningitis in pediatrics. This study was focused on providing information related to genetic characteristics and diversities of HEV which prevailed between 2007 and 2009 in Busan, Korea. A total of 2,743 specimens were collected from children and screened for isolation of HEV by cell culture and RT-PCR. Among the specimins, 240 isolates were grouped into 21 different HEV serotypes using VP1 RT-PCR. The major etiological agents were CV-A6 and CV-B2 in 2007, E-6 and E-30 in 2008 and CV-B1 in 2009. The occurrence of HEV infections was the most frequent in the summer (May to August, 188 cases, 78.3%). Most of the isolates were identified from specimens from children under 10 years old, with the highest occurrence in the 2 to 4 year old range (15.2%). However, there were no significant differences between male and female children for the isolates. For analyzing genetic characterization, VP1 gene was amplified by RT-PCR and sequenced. The phylogenetic tree was established by Clustal W method using DNASTAR software. Using the sequence analysis of the VP1 region, it was classified into 2 groups; HEV-A and HEV-B. The HEV-A group contained 6 serotypes and sequences of 31 isolates were compared within each serotype. The HEV-B group contained 10 serotypes and the sequences of 41 isolates were compared within each serotype. Homology analysis of the VP1 region showed that the identity scores of HEV-A and B isolates were different. In conclusion, genetic divergences were observed among the isolates from children between 2007 and 2009 in Busan.
Keywords
Busan; human enteroviruses (HEV); phylogenetic tree; RT-PCR; serotype;
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