SEROLOGICAL ASSOCIATIONS BETWEEN PRRS VIRUS AND OTHER SWINE PATHOGENS IN MEXICO

摘要

Serological surveys done in Mexican swine have demonstrated that PRRS virus infection is widely spread reaching up to 80% of the farrow to finish farms (2). Clinical signs vary from none till severe outbreaks of respiratory and reproductive disease where many bacterial and viral swine pathogens can be isolated. Therefore it has been suggested that PRRS viral infection causes immunosuppression or immunomodulation in swine that allows a larger multiplication of other concurrent microorganisms (4,6).