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. 1994 Jun;60(6):1719–1725. doi: 10.1128/aem.60.6.1719-1725.1994

Genotypic Diversity among Bacillus cereus and Bacillus thuringiensis Strains

Cathrine Rein Carlson 1, Dominique A Caugant 2, Anne-Brit Kolstø 1,*
PMCID: PMC201553  PMID: 16349267

Abstract

Twenty-four strains of Bacillus cereus were analyzed by pulsed-field gel electrophoresis (PFGE) and compared with 12 Bacillus thuringiensis strains. In addition, the 36 strains were examined for variation in 15 chromosomal genes encoding enzymes (by multilocus enzyme electrophoresis [MEE]). The genome of each strain had a distinct NotI restriction enzyme digestion profile by PFGE, and the 36 strains could be assigned to 27 multilocus genotypes by MEE. However, neither PFGE nor MEE analysis could distinguish between the two species. Two of the B. cereus strains contained extrachromosomal DNA that hybridized to a cryIA insecticidal toxin probe, and seven strains contained DNA with homology to a Tn4430 transposon probe derived from B. thuringiensis. The results strongly indicate that B. cereus and B. thuringiensis should be regarded as one species.

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Selected References

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