Waterborne giardiasis at a mountain resort: evidence for acquired immunity

In November 1981, an outbreak of waterborne giardiasis occurred at a popular ski resort in Colorado. Stratification of illness by consumption of municipal tap water showed a striking dose-response, with an attack rate of 42 per cent among persons who drank six or more glasses of water per day. Filte...

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Bibliographic Details
Published in:American journal of public health (1971) 1984-06, Vol.74 (6), p.602-604
Main Authors: Istre, G R, Dunlop, T S, Gaspard, G B, Hopkins, R S
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Colorado
Disease Outbreaks - epidemiology
Drinking
Giardia - isolation & purification
Giardiasis - epidemiology
Giardiasis - immunology
Giardiasis - parasitology
Human mycoses
Humans
Infectious diseases
Medical sciences
Mycoses
Water Supply - analysis
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Summary:In November 1981, an outbreak of waterborne giardiasis occurred at a popular ski resort in Colorado. Stratification of illness by consumption of municipal tap water showed a striking dose-response, with an attack rate of 42 per cent among persons who drank six or more glasses of water per day. Filtered water samples revealed Giardia cysts in specimens both before and after treatment, and several deficiencies were found in the water treatment facility. Residents who had lived in the area greater than 2 years had a lower attack rate for illness than short-term residents.
ISSN:0090-0036
1541-0048
DOI:10.2105/AJPH.74.6.602