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Update Date: [2022-09-26]

Publication A SEROLOGICAL SURVEY ON HEMAGGLUTINATING ENCEPHALOMYELITIS VIRUS INFECTION IN TAIWAN

Reportno.

AHRI report No.22

Topic

A Serological Survey on Hemagglutinating Ecephalomyelitis Virus Infection in Taiwan

Department

1.Taiwan Provincial Research Institute for Animal Health. 
2.Yunlin Hsien Livestock Animal Disease Control Center

Author H.J. Tsai,' D. F. Un,' Y. S. Lu1K. S. Tsai,2 Y. L. Lee.' C. Lee' and S. T. Huang' 
Summary

A total of 1452 sera of sows, more than 12-month-old of age, were collected from 70 farms over 4 geographical regions in Taiwan. Hemagglu-tinating-lnhibition (HI) test for detection of antibody were carried out on microtitre system by using hemagglutinating encephalomyelitis virus (HEY) as antigen at dose of 4 hemagglutination (HA) units. Result of the tests revealed that sera from 6S out of 70 farms were shown positive reaction against HEY antigen, the average positive rate was 28.6S% (416/1452). 
The distribution of the positive reaction revealed that the southern region was the highest (40.75%); and that in easten region was the lowest (14.17%); nothem and middle regions were 27 and 22.4% respectively. 
Antibodies against HEY were proved from sera collected in Taiwan in 1979 and every subseqent year. Sera from 1979, 45.32% (155/342) of sera collected over 6 counties in southern region of Taiwan were antibody posi-tive, therefore, it is concluded that HEY infection may be widespread in Taiwan at least since 1979. 

Keyword

hemaglutinating encephalomyelitis virus ;hemagglutination ;Hemagglutinating Inhibition

 


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