Onze tipos ja foram associados com doenca humana, e pelo menos oito teem sido responsaveis por epidemias: Eastern equine encephalitis virus (EEEV), Western equine encephalitis virus (WEEV), Venezuelan equine encephalitis virus (VEEV), Mayaro virus (MAYV), O'nyong-nyong virus (ONNV), Ross River virus (RRV), Chikungunya virus (CHIKV) e Getah virus (GEV) (10).
Ja o Getah virus (GEV) ocorre principalmente no sudeste da Asia e na Australia (29).
Getah virus (genus Alphavirus, family Togaviridae) is a mosquito-borne virus that was first isolated in Malaysia in 1955 from Culex spp.
Ltd, Tokyo, Japan) is available to prevent Getah virus infection and is mainly administered to thoroughbred racehorses registered by the Japan Racing Association.
In mid-September 2014, the number of febrile horses began to increase at the Miho Training Center of the Japan Racing Association in Ibaraki Prefecture; we identified Getah virus infection among these horses.
Reverse transcription PCR (RT-PCR) was conducted using a primer pair targeting nonstructural protein 1 (NSP1) of Getah virus (OneStep RT-PCR Kit, QIAGEN, Hilden, Germany) by using the RNA extracted from the blood samples (8).
Of the 49 blood samples tested among horses 2-7 years of age, 25 were positive for Getah virus by RT-PCR (Table).
These results show that the Getah virus infection occurred among racehorses at the Miho Training Center from midSeptember through late October 2014.
The nucleic acid sequence identities between the Getah virus detected in 2014 and MI-110 were 98.
However, Ross River virus, Getah virus
, Sindbis virus, and Bebaru virus have been reported to circulate in countries that border Thailand (1).