Korean Journal of Veterinary Research 1999;39(1):111-117.
Seroprevalence and epidemiological analysis of porcine reproductive and respiratory syndrome virus in Korea
Choi-kyu Park1, Chung-ho Chang1, Yung-bae Kang1, Chang-hee Lee2, Young-soo Lyoo3, Hyun-soo Kim4
1National Veterinary Research and Quarantine Service
2Department of Veterinary Medicine, Cheju National University
3School of Veterinary Medicine, Kon-Kuk University
4College of Veterinary Medicine, Chungnam National University
돼지 생식기호흡증후군 바이러스의 항체분포 및 역학조사
박최규1, 장정호1, 강영배1, 이창희2, 류영수3, 김현수4
1국립수의과학검역원
2제주대학교 수의학과
3건국대학교 수의학부
4충남대학교 수의과대학
Abstract
A nation wide sero-epidemiological survey of porcine reproductive and respiratory syndrome(PRRS) was carried out to analyze the current status of the PRRS virus infections in the field using the indirect immunofluorescent antibody assay(IFA) with the field isolate PL96-1. Since the first report of the antibody detection to PRRSV in 1993, the prevalence of seropositive pigs has increased dramatically and the data indicate that over 21% of the pigs and around 60% of the farms showed seropositives to the PRRS virus. A slightly higher positive rate was recognized in breeders than fattenings and it might be due to the higher age at the time of testings. No significant regional differences were detected in the sero-epidemiological survey. Higher sero-positive rate in growers indicates that PRRSV infection in the field was common after weaning(around 40 days). However, the number of seropositive pigs were declined in fattening pigs. Sows showed around 26% of sero-positive rate that there is a higher chance of continuous virus circulation in the infected farms. Low rate of sero-positivity in boars(9.8%) implies that there is high demand in proper control measures to prevent virus spreading through breeding procedures such as natural or artificial insemination. Therefore it was concluded that PRRSV infection in domestic swine herds is endemic and the positive rate and economic loses will be increased by spontaneous infections in naive farms.
Key Words: porcine reproductive and respiratory syndrome(PRRS), seroprevalence, Indirect immunofluorescent assay(IFA)


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