In-vitro Antimicrobial Susceptibility of Pathogenic Bacteria in Rainbow Trout (Oncorhynchus mykiss, Walbaum)

Authors: ŞÜKRÜ KIRKAN, ERGÜN ÖMER GÖKSOY, OSMAN KAYA, SERTEN TEKBIYIK

Abstract: MIC_{50} and MIC_{90} values of ciprofloxacin, trimethoprim-sulphamethoxazole, tetracycline and erythromycin for 39 fish pathogenic bacterial strains (Yersinia ruckeri, Enterococcus seriolicida, and Aeromonas salmonicida) were determined using the E-test and agar dilution method. The MIC_{50} value of ciprofloxacin was approximately 1 mg/l for all fish pathogenic isolates. All fish pathogenic isolates showed elevated susceptibility to ciprofloxacin.

Keywords: Yersinia ruckeri, Enterococcus seriolicida, Aeromonas salmonicida, MIC, E-test, agar dilution method

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