Role of water factor in the spread of Legionella infection in a non-endemic area

Svetlana Sergeevna Smirnova; V V Romanenko; A Yu Esaulkova; E Yu Kocherovskaya; A L Durasova; S S Smirnova; V V Romanenko; A Yu Esaulkova; E Yu Kocherovskaya; A L Durasova

doi:10.17816/EID40560

Epidemiology and Infectious Diseases ›› 2011, Vol. 16 ›› Issue (2) : 28 -32. DOI: 10.17816/EID40560

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Role of water factor in the spread of Legionella infection in a non-endemic area

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Board of the Russian Inspectorate for the Protection of Consumer Rights and Human Welfare in the Sverdlovsk Region

Center for Hygiene and Epidemiology in the Sverdlovsk Region, Yekaterinburg

Board of the Russian Inspectorate for the Protection of Consumer Rights and Human Welfare in the Sverdlovsk Region

Center for Hygiene and Epidemiology in the Sverdlovsk Region, Yekaterinburg

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Abstract

The results of examining the water of its centralized supply sources were analyzed in the Sverdlovsk Region over 2009. Legionella DNA contamination was found to occur in 12.71±1.02% of the water samples, including that in 9.09±5.00 and 13.27±1.07% of the cold and hot water ones. Legionella DNA is most frequently detectable in the water in May-June and November-December. The isolation of Legionella cultures also demonstrates similar trends. The pattern of Legionella isolated in the Sverdlovsk Region showed a preponderance of L. pneumophila serogroups 2-14 (91.3%) detectable in a quantity of 10 (23.82%) to 1000 (38.09%) CFU/l in the hot water practically in the whole year. It was established there was a weak correlation between the incidence of community-acquired pneumonias and acute respiratory diseases and the detection rate for Legionella DNA (r = 0.15; p > 0.05). At the same time, such a correlation of moderate strength does not rule out the implication of Legionella in the etiology of nosocomial pneumonias (r = 0.61; p < 0.05).

Keywords

legionellosis / hot water / community-acquired and nosocomial pneumonias

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Svetlana Sergeevna Smirnova, V V Romanenko, A Yu Esaulkova, E Yu Kocherovskaya, A L Durasova, S S Smirnova, V V Romanenko, A Yu Esaulkova, E Yu Kocherovskaya, A L Durasova. Role of water factor in the spread of Legionella infection in a non-endemic area. Epidemiology and Infectious Diseases, 2011, 16(2): 28-32 DOI:10.17816/EID40560

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