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Appl Environ Microbiol. 1983 January; 45(1): 337-339

Legionella incidence and density in potable drinking water supplies.

ABSTRACT

The incidence and density of Legionella spp. in raw water, water at various stages of treatment, and in potable distribution water were determined by direct immunofluorescence. The number of cells reacting with Legionella-specific fluorescent antibody conjugates in raw waters ranged from about 10(4) to 10(5) cells/liter, whereas the concentrations of fluorescent antibody-positive cells in the distribution waters were generally 10- to 100-fold lower than in the raw source waters. No viable or virulent Legionella strains were isolated from either the source or distribution waters. However, Legionella spp. are infrequently isolated from water at temperatures below 15 degrees C as was the case in the system surveyed in this study.

This article has been cited by other articles:

• Wullings, B. A., van der Kooij, D. (2006). Occurrence and Genetic Diversity of Uncultured Legionella spp. in Drinking Water Treated at Temperatures below 15{degrees}C. Appl. Environ. Microbiol. 72: 157-166 [Abstract] [Full Text]