Yersinia enterocolitica: virulence markers and antibiogram

ABSTRACT

Thirty-four strains of Yersinia enterocolitica belonging to six sero-biovars isolated from apparently healthy animals were screened for virulence markers and 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 one 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: