YERSINIA ENTEROCOLITICA: VIRULENCE MARKERS AND ANTIBIOGRAM

Document Type : Original Article

Authors

1 Dept. of Microbiology, Faculty of Veterinary Medicine, Cairo University

2 Animal Reproduction research Institute, Giza

3 Animal Health Research Institute, Dokki, Giza.

4 Dept. of Microbiology, Faculty of Veterinary Medicine, Suez Canal University.

Abstract

Thirty four strains of Yersinia enterocolitica belonging to six sero-/biovars isolated from apparently healthy animals were screened for virulence markers arid antimicrobial susceptibility test. Out of 34 isolates of Yersinia enterocolitica, 21 (81.8%) were positive for production of heat  stable enterotoxin, 3 isolates (8.8%) positive for mouse lethality test and 1 isolate (2.9%) for guinea pig conjunctivitis. All isolates were surprisingly negative for plasmids analysis and autoagglutination test (FU Berlin). Antibiogram of isolates showed that chloramphenicol, colistin, and tetracycline were the most effective amongst antimicrobials against isolates. All were resistant to ampicillin, carbenicillin, methicillin and 
penicillin G by disc diffusion method.

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