Isolation, Identification and in vitro Susceptibility of Avian Escherichia coli to Selected Fluoroquinolones

Summary 50 clinical Escherichia coli were isolated from 51 broiler farms in Urmia. An evaluation on antibacterial susceptibility testing of them against three selected fluoroquinolones was conducted. By using the Mast Diagnostics kit, the O1, O6, O15 and O55 serotypes were determined. For flumequine, enrofloxacin and norfloxacin the MIC values were 97.8, 12.6, and 24.4 µg/ml, respectively. Of the tested bacteria 8.6%, 34.6% and 24.4% were sensitive and 67.5%, 34.8% and 20.4% were resistant to flumequine, enrofloxacin and norfloxacin, respectively.