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Mem. Inst. Oswaldo Cruz ; 103(5): 497-500, Aug. 2008. tab, graf
Artículo en Inglés | LILACS | ID: lil-491962

RESUMEN

The bacterial strain Bacillus cereus is closely related to Bacillus thuringiensis, although any genetic relationship between the two strains is still in debate. Using rep-PCR genomic fingerprinting, we established the genetic relationships between Brazilian sympatric populations of B. cereus and B. thuringiensis simultaneously collected from two geographically separate sites. We observed the formation of both B. thuringiensis and B. cereus clusters, as well as strains of B. cereus that are more closely related to B. thuringiensis than to other B. cereus strains. In addition, lower genetic variability was observed among B. thuringiensis clusters compared to B. cereus clusters, indicating that either the two species should be categorized as separate or that B. thuringiensis may represent a clone from a B. cereus background.


Asunto(s)
Bacillus cereus/genética , Bacillus thuringiensis/genética , Dermatoglifia del ADN/métodos , Variación Genética , Reacción en Cadena de la Polimerasa/métodos , Bacillus cereus/aislamiento & purificación , Bacillus thuringiensis/aislamiento & purificación , Análisis por Conglomerados , Microbiología del Suelo
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