[Isolation of flagellin antigens of salmonellae by the method of ultracentrifugation and their use for preparation of erythrocytic H-diagnostic agents].

Flagellar preparations were obtained from 6 salmonellae strains by differential ultracentrifugation; they were characterized by morphological, immunochemical, and serological tests. The results of investigations showed that the preparations possessed high serological activity; somatic antigen admixture was insignificant. Flagellins extracted from the flagellae were used to prepare erythrocytic H-diagnostic agents. The results of their use in the examination of sera of healthy persons, and of those suffering from typhoid fever and salmonellosis indicated the expediency of using passive H-hemagglutination for diagnostic purposes.