Prevalence of Pathogenic Yersinia enterocolitica Strains on Liver Surfaces of Pigs and Their Antimicrobial Susceptibility

A study to determine the occurrence of pathogenic Yersinia enterocolitica on surfaces of slaughtered pig livers and the antimicrobial resistant pattern of the isolates was carried out in a slaughterhouse in Lower Saxony, Germany. During the slaughtering process, 1,500 surfaces of pig livers from 50...

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Bibliographic Details
Published in:Journal of food protection 2010-09, Vol.73 (9), p.1680-1683
Main Authors: VON ALTROCK, A, ROESLER, U, MERLE, R, WALDMANN, K.-H
Format: Article
Language:English
Subjects:
Abattoirs
Animal productions
Animals
Anti-Bacterial Agents - pharmacology
Antibiotics
Antimicrobial agents
Bacterial Typing Techniques
Biological and medical sciences
Colony Count, Microbial
Dose-Response Relationship, Drug
Drug resistance
Drug Resistance, Bacterial - genetics
Drug Resistance, Multiple, Bacterial
Food contamination & poisoning
Food Contamination - analysis
Food Contamination - prevention & control
Food industries
Food Microbiology
Food safety
Fundamental and applied biological sciences. Psychology
Hogs
Infections
Infectious diseases
Laboratories
Liver
Liver - microbiology
Microbial Sensitivity Tests
Pathogens
Plasmids - genetics
Pork
Potassium
Prevalence
Swine
Terrestrial animal productions
Vertebrates
Virulence
Yersinia enterocolitica
Yersinia enterocolitica - drug effects
Yersinia enterocolitica - growth & development
Yersinia enterocolitica - pathogenicity
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Summary:A study to determine the occurrence of pathogenic Yersinia enterocolitica on surfaces of slaughtered pig livers and the antimicrobial resistant pattern of the isolates was carried out in a slaughterhouse in Lower Saxony, Germany. During the slaughtering process, 1,500 surfaces of pig livers from 50 fattening herds were swabbed in order to isolate and characterize Y. enterocolitica isolates by serotyping, detecting the virulence plasmid coding the yopT gene, and resistance testing. Of the livers tested, 4.7% were positive for Y. enterocolitica O:3, which was the only identified serotype. The virulence gene yopT was found in 90.0% of these isolates. Antimicrobial susceptibility was tested by the broth dilution method, and the MICs were determined for 13 antimicrobials. All isolates were resistant to ampicillin and sulfamethoxazole but were susceptible to ciprofloxacin, nalidixic acid, gentamicin, ceftiofur, tetracycline, kanamycin, cefotaxime, and chlorphenicol. Up to now, resistance to florfenicol has always been described in combination with resistance to chloramphenicol. In the present study, 15.3% of the isolates were resistant to florfenicol, while no chloramphenicol-resistant strains could be identified. Multiresistance to three or more antimicrobials was detected in 22 strains (27.3%). Nevertheless, third-generation cephalosporines or fluoroquinolones, which were recommended for extraintestinal Y. enterocolitica infection in humans, were not affected.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-73.9.1680