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Chapter 103 : Fluctuation in Counts in Cooling Towers over a 1-Year Period

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Fluctuation in Counts in Cooling Towers over a 1-Year Period, Page 1 of 2

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Abstract:

Colonization of cooling towers (CTs) by is frequent and has been implicated in many community outbreaks of Legionnaires´ disease (LD). This chapter describes the fluctuation in counts in CTs over a 1-year period. Ten colonies of each positive culture were selected and characterized by nutritional requirements and by the immunoglutination latex assay test (OXOID). was isolated in 13 of 15 CTs (86.6%). All positive CTs were colonized by serogroup 1. No seasonal influence was observed with respect to variations in counts. All of the systems would not have been considered a risk at some sample time during the same season.

Citation: Ragull S, Montenegro R, García-Núñez M, Sanchez I, Soler A, Sopena N, Pedro-Botet M, Esteve M, Sabriá M. 2006. Fluctuation in Counts in Cooling Towers over a 1-Year Period, p 436-438. 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.ch103

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FIGURE 1

Mean of -positive counts (positive samples only)

Citation: Ragull S, Montenegro R, García-Núñez M, Sanchez I, Soler A, Sopena N, Pedro-Botet M, Esteve M, Sabriá M. 2006. Fluctuation in Counts in Cooling Towers over a 1-Year Period, p 436-438. 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.ch103
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References

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1. Fernandez, J. A.,, P. Lopez,, D. Orozco and, J. Merino. 2002. Clinical study of an outbreak of Legionnaires’ disease in Alcoy, Southeastern Spain. Eur. J. Clin. Microbiol. Infect. Dis. 21: 729735.
2. Formica, N.,, G. Tallis,, B. Zwolak,, J. Camie,, M. Beers,, G. Hogg,, N. Ryan, and, M. Yates. 2000. Legionnaires’ disease outbreak: Victoria´s largest identified outbreak. Commun. Dis. Intell. 24:199202.
3. Jansa, J. M.,, J. A. Cayla,, D. Ferrer,, J. Gracia,, C. Pelaz,, M. Salvador,, A. Benavides,, T. Pel-licer,, P. Rodríguez,, J. M. Garces,, A. Segura,, J. Guix, and, A. Plasencia. 2002. Barcelona Le-gionellosis study group. An outbreak of Legionnaires’ disease in an inner city district: importance of the first 24 hours in the investigation. J. Tuberc. Lung Dis. 6:831838.
4. Sabria, M.,, M. Garcia-Nuñez,, M. L. Pedro-Botet,, N. Sopena,, J. M. Gimeno,, E. Reynaga,, J. Morera, and, C. Rey-Joly. 2001. Presence and chromosomal subtyping of Legionella species in potable water systems in 20 hospitals of Catalonia, Spain. Infect. Control Hosp. Epidemiol. 22:673676.
5. Real decreto 865/2003, del 4 de Julio, por el que se establecen los criterios higiénico-sanitarios para la prevención y control de la legionelosis.

Tables

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TABLE 1

Spanish regulation RD 865/2003

Citation: Ragull S, Montenegro R, García-Núñez M, Sanchez I, Soler A, Sopena N, Pedro-Botet M, Esteve M, Sabriá M. 2006. Fluctuation in Counts in Cooling Towers over a 1-Year Period, p 436-438. 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.ch103

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