Factors affecting the efficacy of the <i>Mycoplasma Hyopneumoniae</i> vaccine
By E. Thacker and B. Thacker, Veterinary Medical Research Institute, Iowa State University. - 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.