Faculty of Biotechnology and Food Sciences in Nitra Journal of Microbiology, Biotechnology and Food Sciences 1338-5178 no. 3 vol. 4 2014-12-01 2014-12-01 GENETIC DIVERSITY AMONG YERSINIA ENTEROCOLITICA ISOLATED FROM SEWAGE, RAW MILK AND PACKED FOODS 271 276 EN Shanmuga Priya Seshadhri Shanmuga Priya Seshadhri Thayumanavan Thangavelu Thayumanavan Thangavelu Senthil Murugan Thangavel Senthil Murugan Thangavel A total of 90 isolates (40 from sewage, 30 from raw milk and 20 from packed foods) collected to study the incidence of Yersinia enterocolitica. It was observed that 61 isolates (32 from sewage, 19 from raw milk and 10 from packed foods) were found contaminated with the bacterium. All the isolated strains were confirmed to Yersinia enterocolitica, by using 16S rRNA PCR. Of 61 strains, only five strains (two from sewage and two from packed foods and one from raw milk) were found to be the producers of haemolysin at 37 oC, while among the five strains only two strains from packed foods produced haemolysin at 28 oC. All the isolates showed resistance to amoxicillin and found sensitive to chloramphenicol. Seven strains were producer of High molecular weight proteins (HMWP). 53 strains have produced rough LPS, while the smooth LPS has been observed for 8 isolates. Eleven and six different profiles observed in outermembrane proteins and lipopolysaccaride respectively. Combined primer 1 and 2 RAPD-PCR dendogram shows eight different genotypic patterns.
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