Presencia de animales seropositivos al síndrome reproductivo y respiratorio porcino en Nuevo León

a preliminary study was carried out to obtain serological evidence of the presence of the porcine respiratory and reproductive syndrome (prrs) virus and the risk of infection in different areas and phases of production in five full cycle pig farms in the state of nuevo leon, mexico. sixty blood samples of each farm were obtained (10 for each phase of production: weaning, growing, finishing, pregnancy, lactation and mating-service). the detection of antibodies against the prrs virus was carried out using a commercial kit. all farms were positives in all phases of production. the highest seroprevalences were found in the growing and finishing phases (36% y 56%, respectively).