Antimicrobial resistance of and spp. conventionally sampled from factory-farmed chickens - clinical submissions.

INTRODUCTION

The article discusses the antimicrobial resistance of poultry-isolated bacteria in the Wielkopolska region of Poland.

MATERIAL AND METHODS

From August 2014 - June 2016, antibiotic resistance screening tests were performed involving 4,496 samples of and 84 samples of spp., and the following antibiotics: amoxicillin, amoxicillin with clavulanic acid, colistin, doxycycline, enrofloxacin, florfenicol, neomycin, norfloxacin, spectinomycin, and trimethoprim with sulfamethoxazole. The research used broth the microdilution method and CLSI standards.

RESULTS

During the investigation period of 22 months a growing percentage of isolates showed antibiotic resistance to amoxicillin, amoxicillin with clavulanic acid, colistin, enrofloxacin, neomycin, norfloxacin, spectinomycin, and trimethoprim with sulfamethoxazole. Resistance to doxycycline and florfenicol decreased. The most efficient antibiotics against were colistin (84.64 %), neomycin (80.62 %), and amoxicillin with clavulanic acid (73.05 %). samples were the most susceptible to neomycin (85.71 %), colistin (84.52 %), and trimethoprim with sulfamethoxazole (73.81 %).

CONCLUSIONS

Antibiotic resistance of pathogenic micro-organisms, such as and spp., is a serious problem both for poultry producers and for public health protection. Low efficiency of numerous antibiotic groups forces reflection on limiting the use of medicines in food-producing animals.