Characterization of an isolate of mycoplasma WVU 907 which possesses common antigens to Mycoplasma gallisepticum [Chickens]

Antigenic characteristics of an isolate of mycoplasma WVU 907 were compared with Mycoplasma gallisepticum (MG) and Mycoplasma synoviae. Mycoplasma WVU 907 and MG share common agglutinating and precipitin antigens. Although hemagglutinin is an integral part of WVU 907, hemagglutinating-inhibiting antibody was not detected in sera of chickens inoculated with WVU 907. The clinical symptoms observed in chickens inoculated with WVU 907 were mild. Viral infections of chickens helped spread WVU 907 to contact controls. WVU 907 was more resistant to tylosin than MG was.