Environment

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Browsing Environment by Author "Aheto, Denis Worlanyo"

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    Human health risk assessment from heavy metals in three dominant fish species of the Ankobra river, Ghana
    (ELSEVIER, 2021-05-24) Effah, Elizabeth; Aheto, Denis Worlanyo; Acheampong, Emmanuel
    This study assessed heavy metal contamination of fish and its associated health risk to communities around the Ankobra River in the Western Region of Ghana. Species of fish randomly collected from different sections of the river were analyzed for Cd, Ni, Zn, Pb, Mn, Hg, As, Co and Cr using Atomic Absorption Spectrophotometry. Three commonly consumed fish species, Clarias gariepinus, Sarotherodon melanotheron and Pseudotolithus senegalensis, were analyzed. The health risks were assessed based on the potential non-carcinogenic effect associated with the daily consumption of fish by communities around the river. Concentrations of all the metals were higher in gills than the muscles of all three species. On average, levels of Mn (6.65 ± 7.30 mg.kg􀀀 1), Zn (2.24 ± 1.99 mg.kg􀀀 1) and Hg (3.06 ± 1.53 mg.kg􀀀 1) in all three species were above the permissible limits recommended by the World Health Organization. The health risk estimated for all the heavy metals was < 1, significantly below the ≥ 1 index associated with the incidence of cancer. This suggests that fish species examined in this study pose no significant non-carcinogenic risk and are safe for human consumption.
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    Multiple Antibiotic Resistance-Coliform Bacteria inSomeSelected Fish Farms of the Central Region of Ghana
    (Hindawi, 2020-12-08) Adinortey, Cynthia Ayefoumi; Aheto, Denis Worlanyo; Boateng, Alex Asomeni
    &is study aimed at assessing the quality of water and fishery products as well as the antibiotic resistance status of some selected fish farms of the Central Region of Ghana. Interview guides were administered to farmers to get data on farming practices and antibiotic use. Total coliform loads of catfish (Clarias gariepinus), tilapia (Oreochromis niloticus), and water samples were determined. Coliforms were identified through various biochemical assays, and their antibiotic resistance patterns were determined. Generally, the total coliform loads of water samples significantly surpassed those of fish samples (p < 0.05). &e maximum and minimum antibiotic resistance percentages were recorded for ampicillin (96.83%) and gentamicin (6.35%), respectively. Although farmers stated that antibiotics were sparingly used, coliform bacteria isolated exhibited various antibiotic resistance patterns. Four out of six fish farms harboured some coliforms with multiple antibiotic resistance (MAR) indices above 0.2, an indication that these bacteria originated from potentially dangerous sources where antibiotics are regularly used.