Bacteriocine typing of Providencia isolates.

A method of typing isolates of Providencia is described based on the sensitivities of the organisms to bacteriocines. Twelve standard bacteriocine producing strains were selected from a large number of isolates tested and from these liquid bacteriocine preparations were obtained. The activities of these preparations on over 300 isolates were determined and from this information a bacteriocine typing system has been developed.