Canadian Forest Service Publications

Recherches sur la lysogénie chez Bacillus thuringiensis et B. cereus. 1978. Ackermann, H.W.; Smirnoff, W.A. Can. J. Microbiol. 24(7) : 818-826.

Year: 1978

Issued by: Laurentian Forestry Centre

Catalog ID: 16285

Language: French

Availability: PDF (request by e-mail)

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Forty-eight strains of Bacillus thuringiensis and 12 strains of B. cereus were treated with ultraviolet light and mitomycin C. The former agent was the more effective inducer. Bacillus thuringiensis produces at least seven different phage particiles, with long, non-contractile tails. The frequencies of lysogeny and polylysogeny are 83 and 25% respectively. Morphologically defective phages occur in 25% of strains, whereas five of them produce low molecular-weight bacteriocins. One strain of B. cereus harbors "killer-particles". There is no apparent correlation between the presence of phage-like particles, phage sensitivity, and serotypes, biotypes, or the origin of B. thuringiensis strains.