Incidence of Salmonella and Escherichia coli in fish farms and markets in Dinajpur, Bangladesh

Abstract

The research work was conducted to assess the incidence of Salmonella and Escherichia coli (E. coli) contamination in different fish farms and fish markets of Dinajpur district of Bangladesh. The level of incidence of Salmonella contamination was greater in scum samples (93.8%) and for E. coli the higher contamination found in water samples (81.3%). The study showed that, water and fish samples were also Salmonella positive and the percentage was 87.5% and 57.8% respectively and for E. coli contamination about 75% of scum and 75.6% of fish samples were E. coli positive among fish farms samples. In case of market, both basket and fish sample were tested Salmonella positive, the level of incidence of Salmonella contamination was higher for basket samples (100%) and lower in fish samples (48.9%). Meanwhile, E. coli contamination for fish, basket, and mat samples were 75.6%, 68.8% and 75% respectively. Therefore, the results are very much alarming.
 Bangladesh J. Sci. Ind. Res.55(1), 65-72, 2020

Prevalence and molecular characteristics of antimicrobial resistance of Aeromonas hydrophila, Salmonella spp., Vibrio cholerae, fecal coliform, and Escherichia coli in hybrid red tilapia and cultured water

“…Salmonella is a zoonotic pathogen that can be found in fish worldwide. In this study, the highest prevalence of Salmonella (58.3%) was observed in cultivation water, which was consistency to a previous study in fish pond from Bangladesh (87.5%) (Ava et al, 2020). However, the prevalence of Salmonella in freshwater ranged from 11.9-20.6% (Traoré et al, 2014;Antaki et al, 2016).…”

“…High levels of fecal coliforms and E. coli in fish can suggest poor water quality in the production area. The contamination of E. coli in fish is assumed a higher risk of pathogenic bacteria contamination than those fish did not contamination (Ava et al, 2020). Among different types of tilapia sample, including meat, intestine, and gill, the highest concentration of fecal coliform was found in gill (3.0 ± 0.67 × 10 3 CFU/g), whereas the highest concentration of E. coli was found in intestine (1.45 ± 0.19 × 10 3 CFU/g) of tilapia area (Mandal et al, 2009).…”

Phenotypic and Molecular Characterization of <i>Staphylococcaceae</i> and <i>Enterobacteriaceae</i> Species Isolated from Smoked, Dried, and Braised Fish Marketed in Ouagadougou

“…The presumption of Salmonella in the samples requires special attention. Ava et al [29] found high contamination of fish by Salmonella (57.8%) in their study.…”

Microbiome data reveal significant differences in the bacterial diversity in freshwater rohu (Labeo rohita) across the supply chain in Dhaka, Bangladesh

“…Similar to a recent study (Ava et al . 2020), the higher copy number of E. coli , Shigella and S. enterica may have a link to water use for cleaning and basket to hold fish in the market. The frozen fish in the supermarket usually undergone an extra step of hygienic cleaning and processing and that might remove some bacteria before freezing.…”