Comparison of the antibiotic resistance between genetically diverse and toxigenic Bacillus cereus sensu lato from milk, pepper and natural habitats.

Journal of Applied Microbiology
M Bartoszewicz, U Czyżewska

Abstract

Bacillus cereus sensu lato is a complex group of closely related bacteria, which are commonly present in the natural environment and food products. These organisms may cause food poisoning and spoilage as well as opportunistic infections. Thus far, their resistance to selected antibiotics has been explored only in part, especially in the context of strain source. Therefore, our goal was to compare the resistance of B. cereus sl from milk (environment with the potential impact of antibiotics) with strains from soil and pepper (environment without contact with antibiotics) in relation to their origin, toxicity and phylogenetic relationships. Antibiotic resistance of B. cereus sl was assessed by determining their minimal inhibitory concentrations (MICs) followed by statistical analyses. The phylogeny of the bacteria was investigated by multilocus sequence typing, and toxicity was determined with quantitative reverse-transcription real-time PCR. We found that the isolates from milk were more often multiresistant and exhibited a common resistance pattern to β-lactams but a varied sensitivity to the tested macrolides, clindamycin, tetracycline and vancomycin. Moreover they displayed often significantly higher average MICs; however, t...Continue Reading

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Bacillus Cereus is a gram-positive bacteria that is the cause of some foodborne illnesses and leads to diarrhea and vomiting. Discover the latest research on Bacillus Cereus Infection here.