Isolation of Mycoplasma flocculare from swine in the United States.

During 1977 to 1980, Mycoplasma flocculare was isolated from the lungs of 7 swine in the United States. Two of the swine were from a single Alabama herd, 1 was from Minnesota, 2 were from different Illinois herds, and 2 were from different Indiana herds. Three of the swine were from specific-pathogen-free herds and 4 were from conventional herds. The lungs from the 7 swine had gross lesions typical of mycoplasmal pneumonia. Two lungs yielded a mixture of M flocculare and M hyopneumoniae; the remaining 5 yielded M flocculare alone.