Abstract
The bacteriocinogenic strain Lactobacillus paracasei spp. paracasei BN ATC 8w was isolated from traditional «Motal» cheese and has strong antimicrobial activity against some Gram-positive and Gram-negative bacteria. The in situ activity of the strain was studied in skimmed milk against E. coli ATCC 25922 for 24 hours. Cooperative cultivation of the active strain L. paracasei spp. paracasei BN ATC 8w with E. coli ATCC 25922 сells in skimmed milk at a concentration of OD 0.28 after 24 hours (300C) led to a decrease up to almost 50% of the concentration of E. coli, which was found in the absence of an active strain in the medium. This indicates the in situ efficiency of the L. paracasei spp. paracasei BN ATC 8w in skim milk for the biological protection of dairy products from opportunistic pathogens.
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