Enterotoxigenic potential of Bacillus cereus strains isolated from dairy products at different incubation temperatures
2015
Montanhini, M. T. M. | Montanhini Neto, R. | Bersot, L. S.
Twenty-three Bacillus cereus strains isolated from powdered and pasteurized milk carrying the hblACD genes were assessed to evaluate their ability to produce the hemolysin BL enterotoxin (HBL) when incubated at 30ºC and 10ºC. All strains showed enterotoxigenic potential at 30ºC and nine strains (39%) produced the toxin at 10ºC. The results indicated that the expression of the hblACD genes and the subsequent production of the enterotoxin HBL were directly influenced by the incubation temperature. The contamination of dairy products by B. cereus with genetic potential to produce enterotoxins represents an important concern for the industry
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