MULTI DRUG RESISTANCE PATTERNS OF LISTERIA SPECIES IN FROZEN AND LIVE CHICKEN SOLD
abstract
This study was conducted to identify Listeria species’ multidrug resistance patterns in frozen and live chicken sold in Owerri. Utilizing a biochemical and bacteriological identification scheme, isolated Listeria species were identified. Each isolate’s antimicrobial susceptibility was examined. The Bauer-Kirby technique was used to test the following antibiotics: 10 mg ampicillin (A10), 30 mg chloramphenicol (C30), 15 mg erythromycin (E15), 10 mg gentamicin (CN10), 10 units penicillin G (P10), 10 mg streptomycin (S10), 30 mg tetracycline (TE30), or 30 mg vancomycin (VA30). The diameter (in mm) of the zone surrounding each disc was measured and interpreted in accordance with the National Committee for Clinical Laboratory Standards (NCCLS) guidelines after inoculation (of organisms and antibiotics) and incubation of the plates with the antibiotics. Form Chloramphenicol, Gentamycin, Vanconmycin, and Erthromycin were all completely sensitive in the study. Tetracycline and ampicillin showed 50% sensitivity, while Streptomycin and Penicillin showed 75% sensitivity.