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Hyun-Soo Kim,Tae-UkHan,Shien-Young,Kwang-SoonShin,Chul-JoongKim,Jong-TaikKim,Hyun-SooKim 대한수의학회 2002 Journal of Veterinary Science Vol.3 No.3
During the period from January to December of2001, a total of 3,391 swine sera were submited to urlaboratory from 256 farms for the diagnosis of porcinereproductive and respiratory syndrome (PRS). Theantibody to porcine reproductive and respiratorysyndrome virus (PRRSV) was tested by the indirectimunofluorescent antibody (IFA) test. Of the 256farms tested, 230 farms (89.8%) were positive for thePRRSV antibody was 52.1% (1765/3391). Most of thepigs eemed to be infected with PRSV at around 50to 60 days old. The seroprevalence of the antibodybecame higher with age, and peaked at around 100days old. More than one-third of the adult pigs,including boars, gilts, and sows, was positive for thePRSV antibody. The infection of PRSV was chronicand confined to growers and/or finishers in mostfarms. However, the antibody was detected in alproduction phases at some farms .