Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/1481
Title: A probabilistic assessment of the contribution of wastewater-irrigated lettuce to Escherichia coli O157:H7 infection risk and disease burden in Kumasi, Ghana
Authors: Seidu, Razak 
Abubakari, Amina 
Dennis, Isaac Amoah 
Heistad, Arve 
Stenström, Thor-Axel 
Larbi, John A. 
Abaidoo, Robert Clement 
Issue Date: Mar-2015
Publisher: IWA Publishing
Source: Seidu, R.; Abubakari, A.; Dennis, I. A.; Heistad, A.; Stenstrom, T. A.; Larbi, J. A. and Abaidoo, R. C. 2015. A probabilistic assessment of the contribution of wastewater-irrigated lettuce to Escherichia coli O157:H7 infection risk and disease burden in Kumasi, Ghana. Journal of Water and Health. 13 (1): 217-229
Abstract: Wastewater use for vegetable production is widespread across the cities of many developing countries. Studies on the microbial health risks associated with the practice have largely depended on faecal indicator organisms with potential underestimation or overestimation of the microbial health risks and disease burdens. This study assessed the Escherichia coli O157:H7 infection risk and diarrhoeal disease burden measured in disability-adjusted life years (DALYs) associated with the consumption of wastewater-irrigated lettuce in Kumasi, Ghana using data on E. coli O157:H7 in ready-to-harvest, wastewater-irrigated lettuce. Two exposure scenarios – best case and worst case – associated with a single consumption of wastewater-irrigated lettuce were assessed. The assessment revealed wastewater-irrigated lettuce is contributing to the transmission of E. coli O157:H7 in Kumasi, Ghana. The mean E. coli O157:H7 infection risk and DALYs in the wet and dry seasons, irrespective of the exposure scenario, were above the World Health Organization tolerable daily infection risk of 2.7 × 10−7 per person per day and 10−6 DALYs per person per year. It is recommended that legislation with clear monitoring indicators and penalties is implemented to ensure that farmers and food sellers fully implement risk mitigating measures.
URI: http://hdl.handle.net/10321/1481
ISSN: 1477-8920
Appears in Collections:Research Publications (Water and Wastewater Technology)

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