10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 3 2012 (July - September) The aim of this study was to determine the lessThan i greaterThan Lactobacillus plantarum lessThan /i greaterThan isolated from soy milk, the antimicrobial activity of the bacteriocin produced by the isolate against the pathogenic bacteria and antibiotic resistance of these isolates.The identity of the culture was based on characteristics of the strains of lessThan i greaterThan Lactobacillus spp. lessThan /i greaterThan as presented in Bergey's Manual of Determinative Bacteriology, carrying out microscopy (morphology), Gram staining, growth at 15 and 45°C, and fermentation of different carbon sources and growth in 7.5% NaCl. On the basis of all of the identification tests, among fifty three isolates, twenty nine strains isolated from the soymilk were identified as lessThan i greaterThan Lactobacillus sps lessThan /i greaterThan . A total of five among twenty nine were lessThan i greaterThan L. plantarum lessThan /i greaterThan and showed good inhibitory activity against the pathogens. The lessThan i greaterThan L. plantarum lessThan /i greaterThan isolates were resistant to one of the antibiotic discs used in this study. Culture supernatants obtained from the isolates of lessThan i greaterThan Lactobacillus spp. lessThan /i greaterThan exhibited varying degrees of inhibitory activity against strains of lessThan i greaterThan Escherichia coli lessThan /i greaterThan , lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan , lessThan i greaterThan Pseudomonas aeroginosa lessThan /i greaterThan , Enterobacter cloacae lessThan i greaterThan , Bacillus subtilis lessThan /i greaterThan , lessThan i greaterThan Klebsiella pneumoniae lessThan /i greaterThan , lessThan i greaterThan Salmonella typhimurium lessThan /i greaterThan and lessThan i greaterThan Salmonella typhi lessThan /i greaterThan P.Srinivasan, K. Assalam Khan, U.Raja Perumal, R. Venesh Kumar, K. Suganya And M. Rajalakshmi Lactobacillus plantarum, Plantaricin, Antimicrobial effect, Antibiotic resistance 209-219