Increased rainfall is associated with increased risk for legionellosis

Lauria A. Hicks, C. E. Rose, B. S. Fields, M. L. Dress, J. P. Engel, P. R. Jenkins, B. S. Rouse, D. Blythe, A. P. Khalifah, D. R. Feikin, C. G. Whitney

Research output: Contribution to journalArticle

Abstract

Legionnaires' disease (LD) is caused by Legionella species, most of which live in water. The Mid-Atlantic region experienced a sharp rise in LD in 2003 coinciding with a period of record-breaking rainfall. To investigate a possible relationship, we analysed the association between monthly legionellosis incidence and monthly rainfall totals from January 1990 to December 2003 in five Mid-Atlantic states. Using negative binomial model a 1-cm increase in rainfall was associated with a 2.6% (RR 1.026, 95% CI 1.012-1.040) increase in legionellosis incidence. The average monthly rainfall from May to September 1990-2002 was 10.4 cm compared to 15.7 cm from May to September 2003. This change in rainfall corresponds to an increased risk for legionellosis of approximately 14.6% (RR 1.146, 95% CI 1.067-1.231). Legionellosis incidence increased during periods of increased rainfall; identification of mechanisms that increase exposure and transmission of Legionella during rainfall might lead to opportunities for prevention. Legionnaires' disease (LD) is caused by Legionella species, most of which live in water. The Mid-Atlantic region experienced a sharp rise in LD in 2003 coinciding with a period of record-breaking rainfall. To investigate a possible relationship, we analysed the association between monthly legionellosis incidence and monthly rainfall totals from January 1990 to December 2003 in five Mid-Atlantic states. Using negative binomial model a 1-cm increase in rainfall was associated with a 2.6% (RR 1.026, 95% CI 1.012-1.040) increase in legionellosis incidence. The average monthly rainfall from May to September 1990-2002 was 10.4 cm compared to 15.7 cm from May to September 2003. This change in rainfall corresponds to an increased risk for legionellosis of approximately 14.6% (RR 1.146, 95% CI 1.067-1.231). Legionellosis incidence increased during periods of increased rainfall; identification of mechanisms that increase exposure and transmission of Legionella during rainfall might lead to opportunities for prevention.

Original languageEnglish (US)
Pages (from-to)811-817
Number of pages7
JournalEpidemiology and infection
Volume135
Issue number5
DOIs
StatePublished - Jun 1 2007
Externally publishedYes

ASJC Scopus subject areas

  • Epidemiology
  • Infectious Diseases

Fingerprint Dive into the research topics of 'Increased rainfall is associated with increased risk for legionellosis'. Together they form a unique fingerprint.

  • Cite this

    Hicks, L. A., Rose, C. E., Fields, B. S., Dress, M. L., Engel, J. P., Jenkins, P. R., Rouse, B. S., Blythe, D., Khalifah, A. P., Feikin, D. R., & Whitney, C. G. (2007). Increased rainfall is associated with increased risk for legionellosis. Epidemiology and infection, 135(5), 811-817. https://doi.org/10.1017/S0950268806007552