Effect of three commonly used aquaculture chemicals against enteropathogenic Escherichia coli and Salmonella spp.

Abstract Enteric bacteria such as Escherichia coli and Salmonella spp. are significant fish pathogens related to thousands of cases food-borne diseases every year in human. Since aquatic environments reservoirs these pathogens, they may contaminate the food result outbreaks. Therefore, it is crucial reduce or eliminate from aquaculture facilities. We tested effectiveness three commonly used chemicals, viz., lime, hydrogen peroxide zeolite on bacterial load, under laboratory earthen pond conditions where were applied at a dose recommended for freshwater aquaculture. Results bacteriological study showed that lime had role reducing abundance an initial value 1.5 × 10 3 1.9 cfu/ml 3.9 6.3 final 1.2 within 24 h aquaria condition, respectively. A complete inactivation E. was observed treated ponds post-treatment, whereas remained unaffected water but inactivated aquarium condition after same period. However, neither nor treatment reduced total count well even 1-week post-treatment. It is, therefore, chemicals should be appropriate dose, farmers need adopt biosecurity measures ensure safety.