首页|Technology and safety evaluation of Bacillus coagulans exhibiting antimicrobial activity for starter development
Technology and safety evaluation of Bacillus coagulans exhibiting antimicrobial activity for starter development
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NSTL
Elsevier
Bacillus coagulans can be used as a probiotic or starter strain in fermented foods if it meets certain safety and phenotypic requirements. Here, we assessed the presence of toxin genes, the hemolytic activity, and the anti-biotic resistance of 31 B. coagulans strains isolated from rice straw. No toxin genes were found in any of the strains, and none exhibited alpha- and beta-hemolytic activity. Antibiotic resistance was determined using the minimum inhibitory concentration test and all the strains were susceptible to ampicillin, chloramphenicol, clindamycin, erythromycin, gentamicin, streptomycin, tetracycline, and vancomycin. Most of the strains showed protease and lipase activities and acid production on agar in the absence of added NaCl, and showed antibacterial activity against six common foodborne pathogens. Through these assessments, three strains-ASRS110, ASRS214, and ASRS217-were selected as the most applicable in terms of their functional properties. Among them, 95.7% of cells of strain ASRS217 formed spores after heat treatment. All the B. coagulans strains used in the current study have safe status, but we confirmed the necessity of characterization of functional properties of B. coagulans for starter development because the functional properties are strain-specific.
NSTL
Elsevier
