Geospatial and temporal associations of Getah virus circulation among pigs and horses around the perimeter of outbreaks in Japanese racehorses in 2014 and 2015

• DOI: 10.1186/s12917-017-1112-6
• Publication Date: 2017-06-19T10:44:32Z
• Authors: Hiroshi Bannai; Manabu Nemoto; Hidekazu Niwa; Satoshi Murakami; Koji Tsujimura; Takashi Yamanaka; Takashi Kondo
• Keywords: Epizootic

We studied a recent epizootic of Getah virus infection among pigs in the southern part Ibaraki Prefecture and northern Chiba Prefecture, Japan, focusing on its possible association with outbreaks racehorses 2014 2015. The genomic sequence strain from an infected pig was analyzed to evaluate degree identity strains horses.Sera were collected September December 2012 2015 south (380 29 batches), 2010 north (538 104 batches). They examined by using virus-neutralizing test for virus. Seropositivity rates 2012-2013 2010-2012 ranged 0% 1.6%. In Ibaraki, seropositivity (28.8%) (65.0%) significantly higher than those previous years (P < 0.01); 4/5 batches had positive sera 7/7 Chiba, 2013 (14.1%), (17.8%), (48.0%) 6/27 2013, 3/9 2014, 5/5 Complete genome analysis revealed that isolated 99.89% 99.94% nucleotide horses during 2015.Serological surveillance circulating 2015; this concomitant racehorses. closely related ones outbreaks. To our knowledge, is first convincing case simultaneous circulation both specific areas.