An unusually long-lasting outbreak of community-acquired Legionnaires' disease, 2005–2008, Italy

An unusually long-lasting community-acquired outbreak of Legionnaires’ disease (LD) occurred in the inhabitants of a town in northern Italy from 2005 to 2008. Overall, 43 cases were diagnosed including five deaths. Hundreds of water samples were collected for Legionella isolation but only two clinic...

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Veröffentlicht in:Epidemiology and infection 2015-08, Vol.143 (11), p.2416-2425
Hauptverfasser: SCATURRO, M., FONTANA, S., CRIPPA, S., CAPORALI, M. G., SEYLER, T., VESCHETTI, E., VILLA, G., ROTA, M. C., RICCI, M. L.
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container_end_page 2425
container_issue 11
container_start_page 2416
container_title Epidemiology and infection
container_volume 143
creator SCATURRO, M.
FONTANA, S.
CRIPPA, S.
CAPORALI, M. G.
SEYLER, T.
VESCHETTI, E.
VILLA, G.
ROTA, M. C.
RICCI, M. L.
description An unusually long-lasting community-acquired outbreak of Legionnaires’ disease (LD) occurred in the inhabitants of a town in northern Italy from 2005 to 2008. Overall, 43 cases were diagnosed including five deaths. Hundreds of water samples were collected for Legionella isolation but only two clinical samples were obtained. Clinical strains were ST23 as were environmental isolates detected in most Legionella-positive patients' homes and those from a public fountain. Although no Legionella was found in the municipal water mains, a continuous chlorination was applied in 2008. This action resulted in a halving of cases, although incidence remained tenfold higher than the Italian average incidence until the end of 2013, when it dropped to the expected rate. Retrospective analyses of prevalent wind direction suggested that a hidden cooling tower could have been the main cause of this uncommon outbreak, highlighting the importance of implementation of cooling tower registers in supporting LD investigations.
doi_str_mv 10.1017/S0950268814003094
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This action resulted in a halving of cases, although incidence remained tenfold higher than the Italian average incidence until the end of 2013, when it dropped to the expected rate. 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ispartof Epidemiology and infection, 2015-08, Vol.143 (11), p.2416-2425
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1469-4409
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subjects Adult
Aged
Aged, 80 and over
Community-Acquired Infections - epidemiology
Community-Acquired Infections - microbiology
Cooling
Disease Outbreaks
Disease Reservoirs
Drinking water
Epidemics
Female
Hospitals
Humans
Infections
Italy - epidemiology
Legionella
Legionella pneumophila - isolation & purification
Legionnaire's disease
Legionnaires' disease
Legionnaires' Disease - epidemiology
Legionnaires' Disease - microbiology
Male
Middle Aged
Municipal water
Original Papers
Outbreaks
Retrospective Studies
Water analysis
Water mains
Water Microbiology
Water Purification
Water sampling
Water Supply
Wind
title An unusually long-lasting outbreak of community-acquired Legionnaires' disease, 2005–2008, Italy
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