Production Of Some Virulence Factors Under Different Growth Conditions And Antibiotic Susceptibility Pattern Of <i>Aeromonas hydrophila </i>

Abstract

The production of some virulence factors under different growth conditions and antibiotic susceptibility pattern of Aeromonas hydrophila were investigated in this study. The virulence factors tested on the isolates included haemolytic activity, exopolysaccharide (capsule) and toxin production. Other cell property evaluated was antibiotic resistance. Of the several chemotherapeutants tested, streptomycin had Minimal Inhibitory Concentration (MIC) and Minimal Cidal Concentration (MCC) at 25 µg/ml; flumequine, MIC 15 µg/ml and MCC 20 µg/ml; nitrofurantoin, MIC 20 µg/ml and MCC at 20 µg/ml; chloramphenicol, MIC 15 µg/ml and MCC 30 µg/ml and nalidixic acid, MIC 25 µg/ml, MCC 30 µg/ml, respectively. Virulence characteristics were apparent from the study; the properties exhibited such as s-haemolytic activity (F= 1.32551; p 0.05) were evidence of the pathogenic potential of A. hydrophila.