Antibiotic Sensitivity Profiles of Salmonella typhimurium and E. coli O157: H7 Isolates from Ready to Eat Chicken Meat in Ibadan-Nigeria

Abstract

Background: The global increase in the use of antibiotics in poultry and livestock production has significantly resulted in the emergence of antibiotic resistant bacteria. There is a growing global concern of the effect of antibiotic resistance on both animals and humans. The aim of this study was to determine the antibiotic resistance profile of Salmonella typhimurium and E. coli 0157:H7 in ready to eat chicken meat in Ibadan, Nigeria. Method: A set of 500 pieces of chicken parts were purchased from sampled eateries in Ibadan, Nigeria. Standard microbiological techniques were used to isolate Salmonella and E. coli biochemically and serologically. All confirmed isolates were subjected to in vitro antibiotic susceptibility testing against 8 antibiotics of different classes of Gram negative antimicrobial-impregnated multidisks (ABTEK) Result: The resistance pattern revealed E. coli 0157:H7 and Salmonella isolates were resistant to 5 drugs namely; Ceftazidime, Cefuroxime, Augmentin, Nitrofurantoin and Ampicillin. Highest resistance of E. coli isolates to Augmentin and Ampicillin were indicated both having a frequency of 11 (84.6%) and least resistance to Gentamicin, Ciprofloxacin and Ofloxacin 0 (0.00%) were indicated. Three antibiotics that showed 100% sensitivity by all the isolates were Gentamicin, Ciprofloxacin and Ofloxacin. Conclusion: The study revealed that Isolated E. coli and Salmonella strains from ready to eat chicken parts were resistant to five antibiotics; Ceftazidime, Cefuroxime, Augmentin, Nitrofurantoin and Ampicillin and very susceptible to three antibiotics namely; Gentamicin, Ciprofloxacin and Ofloxacin.