Reducing Legionella Colonization of Water Systems with Monochloramine
Brendan Flannery* , Lisa B. Gelling†, Duc J. Vugia‡, June M. Weintraub§, James J. Salerno¶, Michael J. Conroy¶, Valerie A. Stevens*, Charles E. Rose*, Matthew R. Moore*, Barry S. Fields*, and Richard E. Besser*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †California Emerging Infections Program, Oakland, California, USA; ‡California Department of Health Services, Richmond, California, USA; §City and County of San Francisco Department of Public Health, San Francisco, California, USA; ¶San Francisco Public Utilities Commission, Burlingame, California, USA
Figure. Legionella colonization of water heaters and point-of-use outlets sampled during 6 rounds of environmental sampling in buildings, San Francisco, California (in rows), by residual disinfectant and sampling interval. Legionella species or serogroups of Legionella pneumophila are represented with different colors. Each row represents a single building and each cell represents the results of Legionella culture for a site within the building. H, water heater; P, point-of-use outlet.
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