FACTORS AFFECTIiNG MYCOPLASMA HYOPNEUMONIAE VACCINE EFFICACY

摘要

Porcine respiratory disease complex (PRDC) causes significant economic losses to swine producers world wide. PRDC is characterized by slow growth, decreased feed efficiency, lethargy, anorexia, fever, cough and dyspnea. Porcine reproductive and respiratory syndrome virus (PRRSV) and Mycoplasma hyopneumoniae (M. hyo) are two of the most common pathogens isolated from pigs exhibiting signs of PRDC. Recent research in our laboratory found that M. hvo potentiated the pneumonia induced by PRRSV (1). M. hyo, the cause of mycoplasmal pneumonia, causes a mild chronic pneumonia commonly complicated by opportunistic infections. Vaccines against M. hyo are commonly used as aids for controlling swine respiratory disease.