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Concentrations and human health risk assessment of organochlorine pesticides in edible fish species from a Rift Valley lake-Lake Ziway, Ethiopia

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Title: Concentrations and human health risk assessment of organochlorine pesticides in edible fish species from a Rift Valley lake-Lake Ziway, Ethiopia
Authors: Yohannes, Yared B. Browse this author
Ikenaka, Yoshinori Browse this author →KAKEN DB
Saengtienchai, Aksorn Browse this author
Watanabe, Kensuke P. Browse this author
Nakayam, Shouta M. M. Browse this author
Ishizuka, Mayumi Browse this author →KAKEN DB
Keywords: Organochlorine pesticides
Fish
Lake Ziway
Risk assessment
Issue Date: Aug-2014
Publisher: Elsevier
Journal Title: Ecotoxicology and Environmental Safety
Volume: 106
Start Page: 95
End Page: 101
Publisher DOI: 10.1016/j.ecoenv.2014.04.014
PMID: 24836883
Abstract: Fish consumption is known to have several health benefits for humans. However, the accumulation of organic pollutants, like organochlorine pesticides (OCPs) could pose health hazards. Thus, OCPs in edible fish species (Oreochromis niloticus, Tilapia zillii, Carassius spp., and Clarias gariepinus) from Lake Ziway, an Ethiopian Rift Valley Lake were investigated to assess the potential human health hazards of these contaminants. Dichlorodiphenyltrichloroethanes (DDTs), hexachlorocyclohexanes (HCHs), chlordanes, and heptachlors were observed with Sigma OCPs concentration ranging from 1.41 to 63.8 ng g(-1) ww. DDTs were the predominant contaminants (0.9 to 61.9 ng g(-1) ww), followed by HCHs. The predominance of DDTs may be attributed to their current use in vector control and contamination from past usage. The estimated daily intakes (EDIs) of OCPs from all fish species were much lower than the acceptable daily intakes (ADIs), indicating that consumption of fish is at little risk to human health at present. However, the cancer risk estimates in the area of concern and the hazard ratios (HRs) of HCHs, DDTs, and heptachlors exceeded the threshold value of one, indicating daily exposure to these compounds is a potential concern. This may result in a lifetime cancer risk greater than of I in 10(6). (C) 2014 Elsevier Inc. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/56870
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石塚 真由美

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