Comparison of the presence-absence and membrane filter techniques for coliform detection in small, nonchlorinated water distribution systems.

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ID: 109760
1989
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Abstract
The traditional membrane filter (American Public Health Association, Standard Methods for the Examination of Water and Wastewater, 16th ed., American Public Health Association, Washington, D.C., 1985) and presence-absence (P-A) (J. A. Clark, Can. J. Microbiol. 14:13-18, 1968) techniques for the detection of coliform bacteria were compared in a small nonchlorinated drinking water distribution system by using total positive samples and frequency-of-occurrence analyses. No significant differences (P less than 0.05) were found in detection of the presence of coliform bacteria or in changes in the frequency of occurrence with time. A reduction in P-A sample volume (to 50 ml) was not found to statistically affect the comparative results of traditional membrane filter and P-A tests.
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Authors Bancroft, K;Nelson, E T;Childers, G W;
Journal Applied and environmental microbiology
Year 1989
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Keywords
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