Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Seroprevalence of Antibody to Procine Reproductive and Respiratory Syndrome Virus in Diagnostic Submissions | J. Vet. Sci. 2002 3 3 159-161 JOURNAL OF Veterinary Science Seroprevalence of Antibody to Procine Reproductive and Respiratory Syndrome Virus in Diagnostic Submissions Su-Mi Kim Tae-Uk Han1 Shien-Young Kang2 Kwang-Soon Shin Chul-Joong Kim Jong-Taik Kim and Hyun-Soo Kim College of Veterinary Medicine Chungnam National Univesity Daejeon 305-764 Korea Department of Veterinary Medicine Kangwon National University Chuncheon 200-701 Korea College of Veterinary Medicine Chungbuk National University Cheongju 361-763 Korea Received July 2 2002 Accepted August 20 2002 Abstract During the period from January to December of 2001 a total of 3 391 swine sera were submitted to our laboratory from 256 farms for the diagnosis of porcine reproductive and respiratory syndrome PRRS . The antibody to porcine reproductive and respiratory syndrome virus PRRSV was tested by the indirect immunofluorescent antibody IFA test. Of the 256 farms tested 230 farms were positive for the PRRSV antibody. The overall seroprevalence of the PRRSV antibody was 1765 3391 . Most of the pigs seemed to be infected with PRRSV at around 50 to 60 days old. The seroprevalence of the antibody became higher with age and peaked at around 100 days old. More than one-third of the adult pigs including boars gilts and sows was positive for the PRRSV antibody. The infection of PRRSV was chronic and confined to growers and or finishers in most farms. However the antibody was detected in all production phases at some farms. Key words PRRS virus antibody Seroprevalence Indirect immunofluorescent antibody IFA test Introduction Porcine reproductive and respiratory syndrome PRRS had emerged in the late 1980 s in the United States of America. The etiologic agent of PRRS is porcine reproductive and respiratory syndrome virus PRRSV and was first isolated by Wensvoort at the Central Veterinary This work was supported by the High-Technology Development Project for Agriculture and Forestry Ministry of Agriculture and .
