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Data collected from the WBDOSS from 2005 to 2006 indicated a total of 78 WBDOs, resulting in 4,412 illnesses, 116 hospitalizations, and 5 deaths.
From 2009 and 2010, the WBDOSS identified 81 recreational water-associated disease outbreaks from 28 states and Puerto Rico.
This report summarizes data on recreational water-associated outbreaks electronically reported by October 30, 2014 to CDC's WBDOSS (http:// www.cdc.gov/healthywater/surveillance/) for 2011 and 2012 via NORS.
For example, MAHC recommends additional water treatment (e.g., ultraviolet light or ozone) to inactivate Cryptosporidium oocysts at venues where WBDOSS data indicate there is increased risk for transmission.
([dagger]) Forms and guidance available at http://www.cdc.gov/nors/forms.html; outbreaks resulting from recreational water exposures on cruise ships are not reported to WBDOSS.
This report summarizes data on recreational water--associated disease outbreaks electronically reported to CDC's WBDOSS via NORS [[dagger]] by October 3, 2012, in which the earliest illness onset date occurred during 2009-2010.
Thus, the MAHC represents an opportunity to prevent and control outbreaks through recommendations such as additional water treatment (e.g., ultraviolet light or ozone) to inactivate extremely chlorine-tolerant Cryptosporidium oocysts at venues where WBDOSS data indicate there is increased risk for transmission.
Outbreaks associated with freshwater HABs previously were reported infrequently; only three were reported to WBDOSS for 1978-2008.
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