Haemagglutination and haemagglutination inhibition with Mycoplasma synoviae.

A haemagglutinating antigen prepared from cultures of M synoviae WVU 1853 successfully detected homologous iiaeniagglutination inhibition (III) in sera of fowls and turkeys inoculated with M synoviae . Nonspecific HI was encountered with normal fowl sera but this was removed by treatment with receptor destroying enzyme. It is suggested that M synoviae . HA antigen will be a useful reagent for the diagnosis of M synoviae infection.