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Chapter 112 : Risk Assessment for in Building Water Systems: Managing the Myths

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Risk Assessment for in Building Water Systems: Managing the Myths, Page 1 of 2

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Abstract:

This chapter relates to the microbial ecology of building water systems, aspects of virulence and dose response, and the notion of generic risk factors. Total heterotrophic plate count (TPC) evaluations can be a rapid and reliable means to augment culture for risk management in spa pools. virulence is extremely variable within and between species and serogroups. Cooling tower-associated outbreaks of disease are almost exclusively associated with , and for the most part with serogroup 1. It has been suggested that concentrations in water relate to risk, as they can be used as predictors of dose. Action directives based on the colony-forming units have been promoted as reliable risk management tools. The currently available evidence base demonstrates that health risk is variable between water systems. Factors such as total microbial load, species, disease transmission, and population exposure change dramatically with the nature of the disseminating system. Although there are common ecological determinants of growth and infection, the risks cannot rationally be generically applied. Available reports strongly suggest that good design, knowledge, and maintenance of water systems in the built environment are the most critical factors in preventing disease. An accurate and cost-effective risk assessment can only be made by considering these factors and the exposed demography.

Citation: Bentham R. 2006. Risk Assessment for in Building Water Systems: Managing the Myths, p 465-468. In Cianciotto N, Kwaik Y, Edelstein P, Fields B, Geary D, Harrison T, Joseph C, Ratcliff R, Stout J, Swanson M (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555815660.ch112

Key Concept Ranking

Legionella pneumophila
0.77380955
Microbial Ecology
0.52380955
0.77380955
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References

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1. Bentham, R. 2002. Routine sampling and temporal variation of Legionella concentrations in cooling tower water systems, p. 321324. In R. Marre,, Y. Abu Kwaik,, C. Bartlett,, N. P. Cianciotto,, B. S. Fields,, M. Frosch,, J. Hacker, and, P. C. Lück (ed.). Legionella, ASM Press, Washington, D.C.
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