Incidence and pathogenicity of yersinia enterocolitica isolates from foods in Turkey [Turkiye'de gidalardan i̇zole edilen yersinia entocolitica'nin yaygiliǧi ve patojenitesi]

During a year period,at 150 from each food group,a total of 750 samples including ice cream,raw milk,feta cheese,chicken drumsticks and minced meat collected from markets located in the northeast region of turkey (kars,ardahan and igdir) were analyzed for determining of yersinia spp. incidence. fifty seven of samples (7.6%) were evaluated as positive for yersinia spp. and 18 (2.4% in total) of them,isolated from 6 feta cheese,4 ice cream,2 chicken drumsticks,4 minced meat and 2 raw milk samples,were identified as pathogenic y. enterocolitica. all the 18 pathogenic strains were tested for their antimicrobial susceptibility and some of the isolates were found to be resistant to ticarcillin (n=6),netilmicin (n=5),tetracycline (n=1) streptomycin (n=17),gentamicin (n=12),kanamycin (n=17),furazolidone (n=6),clindamycin (n=18) and cephazolin (n=18) while all of them were susceptible to sulphamethoxazole/trimethoprim,ciprofloxacin,chloramphenicol and imipenem. according to findings,cold enrichment at 4°c for 14 days seems to be more effective for isolation of yersinia spp. than enrichment at 25°c for 24 h.