CDC IDs outbreak trends tied to treated recreational water

CDC IDs outbreak trends tied to treated recreational water

(HealthDay)—Outbreaks associated with treated recreational water with confirmed infectious etiology are usually caused by Cryptosporidium, Legionella, or Pseudomonas, according to research published in the May 18 issue of the U.S. Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report.

Michele C. Hlavsa, M.P.H., from the CDC in Atlanta, and colleagues describe 493 outbreaks associated with treated reported during 2000 to 2014.

The researchers found that 58 percent of the 363 outbreaks with confirmed infectious etiology were caused by Cryptosporidium, 16 percent by Legionella, and 13 percent by Pseudomonas. Overall, 24,453 cases were identified in the 363 outbreaks; 89, 4, and 3 percent were caused by Cryptosporidium, Pseudomonas, and Legionella, respectively. Of the eight reported deaths, at least six occurred in persons affected by outbreaks caused by Legionella. The leading setting was hotels, which were associated with 32 percent of the 493 outbreaks. The outbreaks had a bimodal temporal distribution: 56 percent started in June to August, and 9 percent started in March.

"Assessment of trends in the annual counts of outbreaks caused by Cryptosporidium, Legionella, or Pseudomonas indicate mixed progress in preventing transmission," the authors write. "Pathogens able to evade chlorine inactivation have become leading etiologies."


Explore further

Outbreaks linked to drinking water mainly due to Legionella

More information: Abstract/Full Text

Copyright © 2018 HealthDay. All rights reserved.

Citation: CDC IDs outbreak trends tied to treated recreational water (2018, May 26) retrieved 19 August 2019 from https://medicalxpress.com/news/2018-05-cdc-ids-outbreak-trends-tied.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
2 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more