Aeromonas hydrophila: Antimicrobial Susceptibility and Histopathology of Isolates from Diseased Catfish, Clarias gariepinus (Burchell)

High antibiotic resistance is seen in bacterial infections caused by members of the genus Aeromonas [1]. They are amid the most common diseases of fish especially those in pond systems containing recirculation [2]. The emergence of resistance to antimicrobial agents in bacterial pathogens is a global public health problem [3]. A. hydrophila is a microorganism widely distributed in nature: in water, soil, food. It is also part of the normal bacterial flora of many animals. As an opportunistic microorganism it is a secondary biological agent that contributes to the occurrence of a fish disease and its deterioration Yu et al [4]. A. hydrophila is a Gram-negative aerobic and facultative anaerobic, oxidase-positive motile bacterium that dwells in aquatic environments and in gastrointestinal tracts of healthy fish [5].