Safety assessment on microbial and heavy metal concentration in clarias gariepinus (African catfish) cultured in treated wastewater pond in Kumasi, Ghana

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dc.creatorMark, Y.A.
dc.creatorAmoah, Philip
dc.creatorNelson, A.W.
dc.creatorMuspratt, A.
dc.creatorAikins, S.
dc.date2019-01-28
dc.date2018-03-07T10:16:33Z
dc.date2018-03-07T10:16:33Z
dc.date.accessioned2026-06-27T18:43:22Z
dc.descriptionThis study assesses the microbial and heavy metal distribution in African catfish (Clarias gariepinus) cultured in waste stabilization pond, and their subsequent suitability for human consumption. Treated wastewater-fed pond (WFP) was used in the culture of the fish with a non-wastewater fed pond (NWFP), fed with ground and rain water as control. Pond water, sediments and fish tissue (gill, liver, gut and skin) samples from both sources were analyzed for pathogens and heavy metal levels. Escherichia coli populations in the sediments and water from the WFP exceeded the maximum permissible limit by 2–3 log units as expected. Significantly higher levels of pathogen contamination were detected in the gut and skin of fish from the WFP than the NWFP. Heavy metal concentrations in all samples fell within the Food and Agricultural Organization (FAO)/World Health Organization (WHO) and National Oceanic and Atmospheric Administration (NOAA) permissible limits except for iron and cadmium. There were significantly higher heavy metal concentrations in gill and liver than the muscle. Even though iron recorded the highest concentrations in fish tissue, the concentrations (0.1–2.0 mg kg-1) were below the expected daily nutritional requirement (1–2 mg) for humans and pose no toxicological risk. However, catfish from WFP would require precautionary measures such as cooking/grilling prior to consumption to avoid pathogen infection.
dc.identifierhttps://hdl.handle.net/10568/91303
dc.identifier.urihttp://hdl.handle.net/123456789/163688
dc.languageen
dc.publisherInforma UK Limited
dc.rightsOpen Access
dc.sourceMark, Y.-A.; Amoah, Philip; Nelson, A. W.; Muspratt, A.; Aikins, S. 2017. Safety assessment on microbial and heavy metal concentration in clarias gariepinus (African catfish) cultured in treated wastewater pond in Kumasi, Ghana. Environmental Technology. 11p. (Online first).. . 10.1080/09593330.2017.1388851
dc.subjectaquaculture
dc.subjectafrican catfish
dc.subjectbiological contamination
dc.subjectheavy metals
dc.subjectrisk assessment
dc.subjectwastewater
dc.subjectfish ponds
dc.subjectmicrobiological analysis
dc.subjectpathogens
dc.subjectchemicophysical properties
dc.subjectsediment
dc.subjecthealth hazards
dc.titleSafety assessment on microbial and heavy metal concentration in clarias gariepinus (African catfish) cultured in treated wastewater pond in Kumasi, Ghana
dc.typeJournal Article

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