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Outbreak of giardiasis associated with a community drinking-water source

  • E. R. DALY (a1), S. J. ROY (a2), D. D. BLANEY (a1) (a3), J. S. MANNING (a1), V. R. HILL (a3), L. XIAO (a3) and J. W. STULL (a1) (a4)...
Abstract
SUMMARY

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.

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Corresponding author
*Author for correspondence: E. R. Daly, MPH, Communicable Disease Surveillance Section, New Hampshire Department of Health and Human Services, 29 Hazen Drive, Concord, NH03301-6504, USA. (Email: erdaly@dhhs.state.nh.us)
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3. G Birkhead , RL Vogt . Epidemiologic surveillance for endemic Giardia lamblia infection in Vermont: the roles of waterborne and person-to-person transmission. American Journal of Epidemiology 1989; 129: 762768.

5. F Gagnon , Risk of giardiasis associated with water supply in an endemic context. International Journal of Environmental Health Research 2006; 16: 349359.

8. JM Stuart , Risk factors for sporadic giardiasis: a case-control study in southwestern England. Emerging Infectious Diseases 2003; 9: 229233.

14. IM Sulaiman , Triosephosphate isomerase gene characterization and potential zoonotic transmission of multispecies Giardia duodenalis. Emerging Infectious Diseases 2003; 9: 14441452.

17. VR Hill , Multi-state evaluation of an ultrafiltration-based procedure for simultaneous recovery of enteric microbes in 100-L tap water samples. Applied and Environmental Microbiology 2007; 73: 42184225.

21. LJ Robertson , Application of genotyping during an extensive outbreak of waterborne giardiasis in Bergen, Norway, during autumn and winter 2004. Applied Environmental Microbiology 2006; 72: 22122217.

27. BR Dixon , Giardia duodenalis and Cryptosporidium spp. in the intestinal contents of ringed seals (Phoca hispida) and bearded seals (Erignathus barbatus) in Nunavik, Quebec, Canada. Journal of Parasitology 2008; 94: 11611163.

28. P Foronda , Identification of genotypes of Giardia intestinalis of human isolates in Egypt. Parasitology Research 2008; 103: 11771181.

29. SM Caccio , U Ryan . Molecular epidemiology of giardiasis. Molecular and Biochemical Parasitology 2008; 160: 7580.

30. A Keeley , BR Faulkner . Influence of land use and watershed characteristics on protozoa contamination in a potential drinking water resources reservoir. Water Research 2008; 42: 28032813.

34. BG Dunlap , ML Thies . Giardia in beaver (Castor canadensis) and nutria (Myocastor coypus) from east Texas. Journal of Parasitology 2002; 88: 12541258.

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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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