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Publication The serological investigation of Akabane disease in Taiwan  

Update Date: [2013-11-13]

NO.: 32

AHRI report No.32


The serological investigation of Akabane disease in Taiwan



Taiwan Animal Health Research Institute

Author Yung-Kung Liao, chin-Yen Chang and Yung-Siu Lu

A survey of antibody respcnse in cattle against Akalane virus were cxndusoted. The PT-i? train of Akabane virus isola1 from iccal herd was used as antigen for the serologicalinvestigation. 89%(158/181)and93 % (149/i6J)oftheserafrom cattle inth nonsuppurative encephalitis syndrome showed rcGitive reacton in the antibody test in 1989 and 19%, reseotively. Their ad cattle in Miaoli disthct were also monitered the antibody respDnse at monthly intervals in 1993. The poGitive rate was 6% in April, when the cattle were just transferred into farm, then increased to 24 %, 31 % and % % in May, June and Octoker, resjtotively. The pcxsitive rate of impod herd increased as they steyed in farm. Four sentinel cattle herds in Tainan dith theantibcdy distribution every month fronJulyof 1993 toluneof 1994. The average antibody titer increased from July to Octoker of 1993, and the highest titer were found in Octorker of 1993. From antibody’s respo’nse of the sentinel herds in different area, we susreotl that the enviroments and climate of the farms would influence the distribution of antibody. The reversion to higher titer were ohserved in April of 1994, and the same time several abnormal calves were also found in the sentinel herds. The change of antibody respo’nses and abnormal cases in & sentinel herds revealed that Akakene virus was transmit1 kefore April, the time seasonal thifk from spring to summer in Taiwan. Furthermore, we collected 1,652 sea of cattle from 10 district to determine their antibody against Akabane virus in 1 91. 94.3 %(1SS6/1652)ortheseahad4foldorhiertiterandrernni-JtokepoGitive, 22% (37/1652) had2foldandtherest3.S % (59/1652) werenegative. Thehigh nEtive rate in antibody response indicated that the cattle in Taiwan had been naturally inftoi by Akabane virus .T”Liao YK, Chang CV and Lu VS. The serological investigationofAkabane disease inTaiwan. J ChinScc Vet Sd 22 (2):121-128, 19%. tOorrespo’nding author ThL:02 621-2111, FAX:C12 622-5345?


akabane disease, Arbovirus, Serological survey