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

• Published in: Applied water science Vol. 13; no. 4; pp. 96 - 8
• Main Authors: Ferdous, Jannatul, Khan, Mohammed Nurul Absar, Rahman, Md. Khalilur, Kamal, Md, Reza, Md. Shaheed
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.04.2023; Springer Nature B.V; SpringerOpen
• Subjects: Agricultural lime; Aqua chemicals; Aquaculture; Aquaculture facilities; Aquaria; Aquarium fishes; Aquariums; Aquatic environment; Aquatic Pollution; Bacteria; Bacterial load; Biosecurity; Chemicals; Coliforms; Comparative Law; Deactivation; E coli; Earth and Environmental Science; Earth Sciences; Escherichia coli; Fish; Food contamination; Food fish; Food safety; Foodborne diseases; Freshwater; Freshwater aquaculture; Hydrogen; Hydrogen peroxide; Hydrogeology; Inactivation; Industrial and Production Engineering; Inland water environment; International & Foreign Law; Nanotechnology; Original Article; Pathogen; Pathogens; Polyculture (aquaculture); Ponds; Private International Law; Salmonella; Waste Water Technology; Water Industry/Water Technologies; Water Management; Water Pollution Control; Water treatment; Zeolites; Agricultural lime; Aqua chemicals; Bacterial load; Pathogen
• ISSN: 2190-5487; 2190-5495
• DOI: 10.1007/s13201-023-01894-6

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