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Giardiasis Risk From an Unfiltered, Protected Surface Water Source
Author(s) -
Glicker Joseph L.,
Edwards Roger A.
Publication year - 1991
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1991.tb07248.x
Subject(s) - water supply , surface water , epidemiology , incidence (geometry) , water source , environmental health , environmental science , geography , environmental engineering , water resource management , medicine , mathematics , pathology , geometry
This article describes the efforts of water utility personnel to determine whether the level of endemic giardiasis observed in their service area could be attributed to the surface water supply, which is chloraminated but not filtered. Comparison of epidemiological data for the county in which the utility is located with data from another county that used conventionally treated water showed similar incidence rates, partitioning into risk categories, and age distributions for giardiasis. There was no correlation between the location of a giardiasis case and disinfection contact time within the unfiltered water's distribution system.