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Journal of Water and Health Vol 08 No 1 pp 35–38 © IWA Publishing 2010 doi:10.2166/wh.2009.136 Estimation of Ascaris infection risks in children under 15 from the consumption of wastewater-irrigated carrotsDuncan Mara and Andrew SleighInstitute for Pathogen Control Engineering, School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK Tel.:ABSTRACT Ascaris lumbricoides, the large human roundworm, infects ~1,200 million people, with children under the age of 15 being particularly at risk. Monte Carlo quantitative microbial risk analyses were undertaken to estimate median Ascaris infection risks in children under 15 from eating raw carrots irrigated with wastewater. For a tolerable additional disease burden of 10-5 DALY (disability-adjusted life year) loss per person per year (pppy), the tolerable Ascaris infection risk is ~10-3 pppy, which can be achieved in hyperendemic areas by a 4-log unit Ascaris reduction. This reduction can be easily achieved by wastewater treatment in a 1-day anaerobic pond and 5-day facultative pond (2 log units) and peeling prior to consumption (2 log units). Keywords: agriculture; Ascaris; children; risk analysis; vegetables; wastewater eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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