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Detection of Salmonella spp., Yersinia enterocolitica and verocytotoxin-producing Escherichia coli O157 in pigs at slaughter in Italy

Detection of Salmonella spp., Yersinia enterocolitica and verocytotoxin-producing Escherichia coli O157 in pigs at slaughter in Italy,10.1016/S0168-16

Detection of Salmonella spp., Yersinia enterocolitica and verocytotoxin-producing Escherichia coli O157 in pigs at slaughter in Italy   (Citations: 21)
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From December 1999 to December 2000, 150 pigs were randomly selected in two large abattoirs of northern Italy. Caecal material and carcass swabs were collected and examined for Salmonella, Yersinia enterocolitica, and Escherichia coli O157. Tonsils were examined for Salmonella and Y. enterocolitica. Salmonella was isolated from the intestinal content of 55 (36.7%) specimens, from 8 (5.3%) tonsils, and from 9 (6.0%) carcasses. Ten different serotypes were detected; the more common were Salmonella derby (37.8%), Salmonella bredeney (21.6%), and Salmonella typhimurium (14.8%). S. typhimurium isolates that belonged to phage-types DT104 and DT208 were 45% and 27.3%, respectively; 18.2% belonged to U302 and 9.1% were non-typeable. Y. enterocolitica was detected in the intestinal matter of 6 (4.0%) slaughtered pigs and in 22 (14.7%) tonsils; however, this pathogen was not found on carcasses. The majority of Y. enterocolitica isolates (82.1%) belonged to serotype O:3 biotype 4, one (3.6%) belonged to serotype O:9, and 13% did not belong to any known biotype. Verocytotoxin-producing E. coli (VTEC) O157 was isolated from the intestinal content of one (0.7%) slaughtered pig and from one (0.7%) carcass; four (2.7%) faecal samples contained E. coli O157 strains negative for the presence of both eae and VT genes.
Journal: International Journal of Food Microbiology - INT J FOOD MICROBIOL , vol. 85, no. 1, pp. 101-110, 2003
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