Abstract
A serological survey was carried out to detect hemagglutination-inhibition (HI) antibody against hemagglutinating encephalomyelitis virus (HEV) from the serum of pig. A total of 6, 797 porcine serum samples were collected from 45 prefectures in Japan. As a result, 3, 393 samples (49.9%) had the antibody. Of them, 1, 992 samples (58.7%) had an HI titer of 1:1280 or high. The positive rate varied from 39.6 to 72.0% in each age-group. It was 53.7, 47.0, 39.6, 52.5, 54.4, and 72.0% in the 0-2, 2-4, 4-6, 6-8, 8-l2, and over-12-month groups, respectively. In short, the positive rate became higher in accordance with the advance in age. The occurrence of such a high positive rate as 53.7% in the 0-2 month group, and the same HI titers of suckling piglets as those of their mother sows may be due to the absorption of antibodies from colostrum. The breed of pigs may not be a factor to induce HEV infection. The positive rate was high in the Kinki and Chugoku districts (66.1 and 65.1%, respectively) and low in the Tohoku and Kanto districts (26.6 and 27.8%, respectively). Antibodies against HEV were proved in Japan in 1965 and confirmed in every subsequent year. In 1973, more than 60.0% of the pigs examined were found to possess those antibodies. Therefore, it is concluded that HEV infection may be widespread in Japan.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Nihon juigaku zasshi. The Japanese journal of veterinary science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
