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Manuscript ID : JCHR-511 Visit : 91 Page: 0 - 0

10.22034/jchr.2015.544104

Article Type: Original Research

Liver Damage Risk Assessment Study in Workers Occupationally Exposed to E-waste in Benin City, South-South Nigeria

Subject Areas : Journal of Chemical Health Risks

John I. Anetor 1 ( Department of Chemical Pathology, Toxicology and Micronutrient Metabolism Unit, College of Medicine, University of Ibadan, Ibadan, Nigeria )
Oladele O. Osibanjo 2 ( Basel Convention Coordinating Centre for Training & Technology Transfer for the African Region & Department of Chemistry University of Ibadan, Oyo State, Nigeria )
Humphrey Benedo Osadolor 3 ( Department of Medical Laboratory Sciences, School of Basic Medical Sciences, College of Medical Sciences, University of Benin, Benin City, Nigeria )
Festus A. Idomeh 4 ( Chemical Pathology Laboratory, Faith MediPlex Hospital, Benin City, Nigeria )
Williams Osazee Igiewe 5 ( Department of Medical Laboratory Sciences, School of Basic Medical Sciences, College of Medical Sciences, University of Benin, Benin City, Nigeria )
Ogochukwu Uzoma Kalikwu 6 ( Department of Medical Laboratory Sciences, School of Basic Medical Sciences, College of Medical Sciences, University of Benin, Benin City, Nigeria )

Received: 2015-08-03 Accepted : 2018-10-29 Published : 2015-09-14

Keywords: Nigeria, Liver damage, E-waste, occupational exposure,

Abstract :

  Large volumes of mostly irreparable electronic waste (e-waste) are shipped to Africa on a monthly basis, of which Nigeria receives the largest share. E-waste management practices in Nigeria have remained completely primitive until date; and e-waste workers have little or no occupational safety knowledge and devices. The thousands of chemicals in e-waste have been reported to be toxic to human health in any degree of exposure. The present study has assessed the risk of liver damage in workers occupationally exposed to e-waste in Benin City, South-south Nigeria in 2014. Serum activities of liver enzymes [alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma glutamyltransferase (GGT) and alkaline phosphatase (ALP)]; and levels albumin (ALB), total bilirubin (T/Bil) and conjugated bilirubin (C/Bil) were determined using standard colorimetric methods. Serum Alpha fetoprotein (AFP) was determined using ELISA in Nigerian e-waste workers (n=63) and in age-matched unexposed participants (n=41) in Benin City. The results showed significantly raised activities of enzymatic biomarkers of liver damage (ALT, AST, ALP and GGT) in the e-waste group compared with the unexposed participants. There was no significant difference in the levels of ALB, T/Bil and C/Bil between exposed and unexposed participants. AFP levels in e-waste workers (3.56 ± 0.34 ng/mL) were significantly different compared with the unexposed group (2.14 ± 0.80 ng/mL) (P< 0.045). The significantly elevated cancer risk biomarker (AFP) and the enzymatic biomarkers of liver damage observed in the Nigerian e-waste workers studied may be associated with occupational exposure to known carcinogens and hepatotoxic metals in e-waste.

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