[Typing of ornithosis strains with species-specific antigens]

Species-specific antigens of three ornithosis strains of varying origin were isolated. These antigens were used in the complement-fixation test to study immune sera to different strains. The ornithosis strains studied were represented by three serotypes. To differentiate ornithosis from other chlamidia infections and for the preparation of diagnostic immune sera it is recommended to use species-specific antigens of serotype 3, while for vaccine production the corresponding strains should be used.