Seroprevalence of antibody to procine reproductive and respiratory syndrome virus in diagnostic submissions.
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 (89.8%) were positive for the PRRSV antibody. The overall seroprevalence of the PRRSV antibody was 52.1% (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.
Kim
Su-Mi
SM
College of Veterinary Medicine, Chungnam National Univesity, Daejeon 305-764, Korea.
Han
Tae-Uk
TU
Kang
Shien-Young
SY
Shin
Kwang-Soon
KS
Kim
Chul-Joong
CJ
Kim
Jong-Taik
JT
Kim
Hyun-Soo
HS
D000367:Age Factors; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect / Q000662:veterinary; D007723:Korea / Q000453:epidemiology; D008297:Male; D019318:Porcine Reproductive and Respiratory Syndrome / Q000175:diagnosis / Q000453:epidemiology / Q000821:virology*; D019316:Porcine respiratory and reproductive syndrome virus / Q000276:immunology / Q000302:isolation & purification*; D016036:Seroepidemiologic Studies; D012737:Sex Factors; D013552:Swine
D000914:Antibodies, Viral