Evaluation of resistance against Antibiotics, Antiseptics and Disinfectansts in Aeromonas hydrophila isolated from Marketed Fishes

Objective: Ten strains of Aeromonas sp. isolated from marketed Channa striatus were identified as Aeromonas hydrophila. Effect of antibiotics with different mode of action and commonly used antiseptics and disinfectants at selected concentrations (25 and 50%) was evaluated.Methods: Disc diffusion method in Muller Hinton Agar plates was used for the evaluation. Antibiotics have been used against infectious bacteria and fungi for over 50 years.Results: The findings of the study indicates that isolated A. hydrophila from diseased C. striatus possess various virulence factors in vitro especially resistance of the isolates to both antibiotics and common antiseptics and disinfectants. Hence, evaluation of phenotypic virulence factors serve as rapid method for detection virulence A. hydrophila from diseased fishes.