[Phage diagnosis of strains of Bacillus cereus isolated from food products].

A total of 80 cultures of Bacillus cereus, isolated from food products, were studies to establish the behaviour to specific phages or the CAM set and the presence of lysogeny. A modern bacteriophage method was tested for the first time in the differentiatons of Bacillus cereus, which was so far studied mainly in the differentiation of Bacillus anthracis. Results showed that bacteriophagy with specific type phages as a method, though not absolutely precise, is dependable for the differentiation of Bacillus cereus. It can be used as a fast adjunct technique in the determination of B. cereus from the view point of its species. No lysogenic strains were established in the cultures investigated.