in taxon swine disease pneumonia of swine, mycoplasmal pneumonia of swine, enzootic enzootic pneumonia of swine Mycoplasmal pneumonia of swine enzootic pneumonia of pigs swine enzootic pneumonia A chronic, clinically mild, infectious pneumonia of pigs caused by mycoplasma hyopneumoniae. Ninety percent of swine herds worldwide are infected with this economically costly disease that primarily affects animals aged two to six months old. The disease can be associated with porcine respiratory disease complex. pasteurella multocida is often found as a secondary infection. swine Mycoplasma pneumonia Mycoplasma pneumonia of pigs MONDO:0025159 Mycoplasma pneumonia of swine swine Mycoplasmal pneumonia MESH:D045729 bacterial pneumonia, non-human animal Sus scrofa