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Research Article Open Access
Avian colibacillosis is responsible for large economic losses in poultry industry. Antimicrobial therapy is an important tool in reducing both the incidence and mortality associated with avian colibacillosis. Antimicrobialresistant Escherichia coli can be transferred from animals to humans through consumption of contaminated food and it causes a public health risk. The present study was conducted to estimate the Geographical and seasonal variation in antimicrobial susceptibility of Escherichia coli isolated from broiler chicken in Iran. Atotal of 401 sample were collected in two geographical regions in Iran.184isolates of E. colifrom North of Iran and217 isolates of E. Colifrom Northwest of Iran were collected since 2012 to 2013, and were analyzed for resistance to 7 antimicrobial agents. Statistical analysis was carried out using SPSS 16.0 where applicable. Antibiograms revealed that the highest level of resistance was observed against Sulfamethoxazole+trimethoprim (Sultrim®)(69.4%) and Enrofloxacin (53.2%) in North and Sulfamethoxazole+trimethoprim (Sultrim®) (53.9%) and Doxycycline(34%) in Northwest of Iran.The most sensitive antibiotics in North were Colistin and Lincomycin+Spectinomycin (Lincospectine®)(20.3% and 13.3% respectively); and in Northwest Colistin and Lincomycin+Spectinomycin (Lincospectine®)(14.8% and 3.8% respectively). Multi drug resistance was also detected in high percentage of E.coli isolates. There were some differences in susceptibility patern of E.coli isolates between seasons of year and two Geographical regions. This study showed that very high level of resistance to some common antibiotics in poultry farms causes treatment failure, because they do not have remedial effects.
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Author(s): Abolfazl Ghaniei Sina Mojaverrostami Bita Lotfallahzadeh Mahdieh Darzi Lemraski Peyman Sepehrnia and Atefe Imani Jajarmi
Escherichia coli, Antibiogram, Broiler chicken, Antimicrobial-susceptibility, Escherichia coli, Antibiogram, Broiler chicken, Antimicrobial-susceptibility