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. 2014 Jan 10;63(1):11-5.

Algal bloom-associated disease outbreaks among users of freshwater lakes--United States, 2009-2010

Elizabeth D Hilborn, Virginia A Roberts, Lorraine Backer, Erin Deconno, Jessica S Egan, James B Hyde, David C Nicholas, Eric J Wiegert, Laurie M Billing, Mary Diorio, Marika C Mohr, Joan F Hardy, Timothy J Wade, Jonathan S Yoder, Michele C Hlavsa; Centers for Disease Control and Prevention (CDC)

Algal bloom-associated disease outbreaks among users of freshwater lakes--United States, 2009-2010

Elizabeth D Hilborn et al. MMWR Morb Mortal Wkly Rep. .

Abstract

Harmful algal blooms (HABs) are excessive accumulations of microscopic photosynthesizing aquatic organisms (phytoplankton) that produce biotoxins or otherwise adversely affect humans, animals, and ecosystems. HABs occur sporadically and often produce a visible algal scum on the water. This report summarizes human health data and water sampling results voluntarily reported to CDC's Waterborne Disease and Outbreak Surveillance System (WBDOSS) via the National Outbreak Reporting System (NORS) and the Harmful Algal Bloom-Related Illness Surveillance System (HABISS)* for the years 2009-2010. For 2009-2010, 11 waterborne disease outbreaks associated with algal blooms were reported; these HABs all occurred in freshwater lakes. The outbreaks occurred in three states and affected at least 61 persons. Health effects included dermatologic, gastrointestinal, respiratory, and neurologic signs and symptoms. These 11 HAB-associated outbreaks represented 46% of the 24 outbreaks associated with untreated recreational water reported for 2009-2010, and 79% of the 14 freshwater HAB-associated outbreaks that have been reported to CDC since 1978. Clinicians should be aware of the potential for HAB-associated illness among patients with a history of exposure to freshwater.

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References

    1. World Health Organization. Toxic cyanobacteria in water: a guide to their public health consequences, monitoring and management. In: Ingrid Chorus I, Bartram J, editors. London, United Kingdom: E&FN Spon; 1999. Available at http://www.who.int/water_sanitation_health/resourcesquality/toxcyanbegin....
    1. World Health Organization. Volume 1: coastal and fresh waters. Geneva, Switzerland: World Health Organization; 2003. Guidelines for safe recreational water environments. Available at http://whqlibdoc.who.int/publications/2003/9241545801.pdf.
    1. Stone D, Bress W. Addressing public health risks for cyanobacteria in recreational freshwaters: the Oregon and Vermont framework. Integr Environ Assess Manag. 2007;3:137–43. - PubMed
    1. Dufour AP, Evans O, Behymer TD, Cantú R. Water ingestion during swimming activities in a pool: a pilot study. J Water Health. 2006;4:425–30. - PubMed
    1. Furey A, Crowley J, Hamilton B, Lehane M, James KJ. Strategies to avoid the mis-identification of anatoxin-a using mass spectrometry in the forensic investigation of acute neurotoxic poisoning. J Chromatogr A. 2005;1:91–7. - PubMed