Endemic giardiasis and municipal water supply

G.G. Fraser and K.R. Cooke

American Journal of Public Health, 1991, vol. 81, issue 6, 760-762

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).

Date: 1991
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Persistent link: https://EconPapers.repec.org/RePEc:aph:ajpbhl:1991:81:6:760-762_9

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