Epidemiological characteristics of norovirus associated with sporadic gastroenteritis among children from the 2006/2007 to 2011/2012 season in Nara Prefecture, Japan

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Abstract

The present study aimed to describe the epidemiological characteristics of norovirus (NoV) associated with sporadic gastroenteritis in regional populations of Nara Prefecture, Japan, from the 2006/2007 to 2011/2012 epidemic season. Fecal specimens of sporadic gastroenteritis collected between September 2006 and August 2012 in Nara Prefecture were examined for the presence of NoV by reverse transcription-polymerase chain reaction. The NoV genotype was determined by nucleotide sequence analysis. In total, 274 NoVs associated with sporadic gastroenteritis were identified. We detected 10 different NoV genotypes: GI/3, GI/4, GI/8, GII/2, GII/3, GII/4, GII/6, GII/7, GII/12, and GII/13. A high NoV detection rate of 35.9% was identified in 1-year-old children. Among the 274 NoV isolates, 142 were obtained from males and 131 were obtained from females (the source of one was unknown). The most prevalent genotype was GII/4, accounting for 117 of the 192 different NoVs identified by sequencing. More epidemiological data will be required to determine the epidemiological characteristics of NoVs in other areas of Japan. Copyright © 2013 S. Karger AG, Basel.

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Yoneda, M., Okayama, A., & Kitahori, Y. (2013). Epidemiological characteristics of norovirus associated with sporadic gastroenteritis among children from the 2006/2007 to 2011/2012 season in Nara Prefecture, Japan. Intervirology, 57(1), 31–35. https://doi.org/10.1159/000353852

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