Distribution of Rotavirus Genotypes from the 2008/2009 to the 2015/2016 Season in Nara Prefecture, Japan.

This study was conducted to investigate the distribution of rotavirus genotypes in Nara Prefecture, Japan before and after the introduction of rotavirus vaccination in 2011. Since the 2011/2012 season, DS-1-like G1P[8] strains have been detected in Nara Prefecture, accounting for about half of all strains in the 2014/2015 season. During the 2015/2016 season, no DS-1-like G1P[8] strains were detected; G2P[4] was the predominant genotype.

Epidemiological Characteristics of Sapovirus and Human Astrovirus Detected among Children in Nara Prefecture, Japan, during the 2009/2010-2014/2015 Seasons.

The current study elucidated the epidemiological characteristics of sapovirus (SaV) and human astrovirus (HAstV) associated with gastroenteritis among children in regional populations of Nara Prefecture, Japan, during the 2009/2010-2014/2015 seasons. The SaV detection rate was 7.5% (71/948) according to reverse transcription-polymerase chain reaction.

Frequency of amantadine-resistant influenza A virus isolated from 2001-02 to 2004-05 in Nara Prefecture.

We investigated the frequency of amantadine-resistant influenza A viruses in Nara Prefecture during four epidemic seasons from 2001-02 to 2004-05. Point mutations within the M2 gene were identified using RT-PCR and DNA sequencing analysis. Five viruses (3.