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Appl Environ Microbiol. 1991 December; 57(12): 3423-3428

Bacteriocin-mediated inhibition of Clostridium botulinum spores by lactic acid bacteria at refrigeration and abuse temperatures.

Department of Food Science, Rutgers State University of New Jersey, New Brunswick 08903-0231.

ABSTRACT

The bacteriocinogenicity of Lactococcus lactis ATCC 11454, Pediococcus pentosaceus ATCC 43200, P. pentosaceus ATCC 43201, Lactobacillus plantarum BN, L. plantarum LB592, L. plantarum LB75, and Lactobacillus acidophilus N2 against Clostridium botulinum spores at 4, 10, 15, and 35 degrees C was investigated by modified deferred and simultaneous antagonism methods. All the strains, except L. acidophilus N2, produced inhibition zones on lawns of C. botulinum spores at 30 degrees C. L. plantarum BN, L. lactis ATCC 11454, and P. pentosaceus ATCC 43200 and 43201 were bacteriocinogenic at 4, 10, and 15 degrees C. Supplementation of brain heart infusion agar with 0 to 5% NaCl increased the radii of inhibition zones during simultaneous antagonism assays. Detectable bacteriocin activities were extracted from freeze-thawed agar cultures of L. plantarum BN and L. lactis ATCC 11454 which had been grown at 4 and 10 degrees C. These results suggest that low levels of L. plantarum BN or L. lactis ATCC 11454, in the presence of 3 or 4% NaCl, could be formulated into minimally processed refrigerated food products for protection against possible botulism hazards.

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