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Accumulation patterns and risk assessment of metals and metalloid in muscle and offal of free-range chickens, cattle and goat in Benin City, Nigeria

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Title: Accumulation patterns and risk assessment of metals and metalloid in muscle and offal of free-range chickens, cattle and goat in Benin City, Nigeria
Authors: Ogbomida, Emmanuel Temiotan Browse this author
Nakayama, Shouta M. M. Browse this author
Bortey-Sam, Nesta Browse this author
Oroszlany, Balazs Browse this author
Tongo, Isioma Browse this author
Enuneku, Alex Ajeh Browse this author
Ozekeke, Ogbeide Browse this author
Ainerua, Martins Oshioriamhe Browse this author
Fasipe, Iriagbonse Priscillia Browse this author
Ezemonye, Lawrence Ikechukwu Browse this author
Mizukawa, Hazuki Browse this author
Ikenaka, Yoshinori Browse this author
Ishizuka, Mayumi Browse this author →KAKEN DB
Keywords: Heavy metals
Hazard Quotient
Hazard Index
Issue Date: 30-Apr-2018
Publisher: Elsevier
Journal Title: Ecotoxicology and environmental safety
Volume: 151
Start Page: 92
End Page: 102
Publisher DOI: 10.1016/j.ecoenv.2017.12.069
Abstract: The use of free range animals for monitoring environmental health offers opportunities to detect exposure and assess the toxicological effects of pollutants in terrestrial ecosystems. Potential human health risk of dietary intake of metals and metalloid via consumption of offal and muscle of free range chicken, cattle and goats by the urban population in Benin City was evaluated. Muscle, gizzard, liver and kidney samples were analyzed for Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb concentrations using inductively coupled plasma mass spectrometer (ICP-MS) while Hg was determined using Hg analyzer. Mean concentrations of metals (mg/kg ww) varied significantly depending upon the tissues and animal species. Human health risk estimations for children and adults showed estimated daily intake (EDI) values of tissues below oral reference dose (RfD) threshold for non essential metals Cd, As, Pb and Hg thus strongly indicating no possible health risk via consumption of animal based food. Calculated Hazard quotient (THQ) was less than 1 (< 1) for all the metals analyzed for both adult and children. However, Cd and As had the highest value of THQ suggestive of possible health risk associated with continuous consumption of Cd and As contaminated animal based foods. Hazard Index (HI) for additive effect of metals was higher in chicken liver and gizzard for children and chicken liver for adults. Thus, HI indicated that chicken liver and gizzard may contribute significantly to adult and children dietary exposure to heavy metals. Principal component analysis (PCA) showed a clear species difference in metal accumulation between chickens and the ruminants. This study provides baseline data for future studies and also valuable evidence of anthropogenic impacts necessary to initiate national and international policies for control of heavy metal and metalloid content in food items.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
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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