Endemic giardiasis and municipal water supply.
- 1 June 1991
- journal article
- Published by American Public Health Association in American Journal of Public Health
- Vol. 81 (6) , 760-762
- https://doi.org/10.2105/ajph.81.6.760
Abstract
To test the hypothesis that endemic giardiasis may be transmitted by unfiltered municipal water supplies, the incidence of laboratory-confirmed giardiasis was studied in a natural experiment due to the arrangement of the public water supply of Dunedin, New Zealand. The incidence rate ratio was 3.3 (90% CI = 1.1, 10.1) for the population receiving unfiltered (microstrained) water relative to that using sand filtered water. In a parallel case-control study of incident cases, the odds ratio for giardiasis and unfiltered (microstrained) water supply was 1.8 (90% CI = 0.5, 6.9).Keywords
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