Abstract
Present study was carried out to evaluate a new bacterial strain, Lactobacillus delbreuckii subsp. bulgaricus F18 as probiotic strain. L. delbreuckii subsp. bulgaricus F18 was isolated from homemade butter and identified by conventional and molecular techniques. The 16S rRNA sequence of the isolate was registered in National Centre for Biotechnology Information (NCBI) under accession number KT865224. In the present study, L. delbreuckii subsp. bulgaricus F18 exhibited highest viable counts against acid tolerance or low pH tolerance (at pH 1 after 2h of incubation), bile tolerance (conc. 1%), autoaggregation (68%), cell surface hydrophobicity against O-xylene (33.9%), antimicrobial activity against various food borne pathogens (inhibition = 100%), antibiotic sensitivity following standard test methods suggested by various research workers.
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