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- Title
Outbreak of giardiasis associated with a community drinking-water source.
- Authors
Daly, E. R.; Roy, S. J.; Blaney, D. D.; Manning, J. S.; Hill, V. R.; Xiao, L.; Stull, J. W.
- Abstract
Giardiasis is a common waterborne gastrointestinal illness. In 2007, a community giardiasis outbreak occurred in New Hampshire, USA. We conducted a cohort study to identify risk factors for giardiasis, and stool and environmental samples were analysed. Consuming tap water was significantly associated with illness (risk ratio 4.7, 95% confidence interval 1.5-14.4). Drinking-water samples were coliform-contaminated and a suspect Giardia cyst was identified in a home water filter. One well was coliform-contaminated, and testing indicated that it was potentially under the influence of surface water. The well was located 12.5 m from a Giardia-contaminated brook, although the genotype differed from clinical specimens. Local water regulations require well placement at least 15 m from surface water. This outbreak, which caused illness in 31 persons, represents the largest community drinking-water-associated giardiasis outbreak in the USA in 10 years. Adherence to well placement regulations might have prevented this outbreak.
- Subjects
NEW Hampshire; GIARDIASIS; WATERBORNE infection; GASTROINTESTINAL diseases; GIARDIA; CONTAMINATION of drinking water; DISEASE risk factors
- Publication
Epidemiology & Infection, 2010, Vol 138, Issue 4, p491
- ISSN
0950-2688
- Publication type
Article
- DOI
10.1017/S0950268809990744