Swimming Pool-Associated Cryptosporidiosis Outbreaks Being Reported More Often — Physician’s First Watch
Swimming Pool-Associated Cryptosporidiosis Outbreaks Being Reported More Often
By Amy Orciari Herman
Reported outbreaks of cryptosporidiosis linked to aquatic facilities doubled between 2014 and 2016, according to an MMWR article.
Of 24 states with cryptosporidiosis data for 2016, roughly half reported outbreaks linked to recreational water facilities (e.g., pools, water playgrounds), with a total of 32 outbreaks that year. In 2014, just 16 outbreaks were reported.
MMWR focuses on outbreaks in Alabama, Arizona, and Ohio, where molecular analysis revealed Cryptosporidium hominis as the infecting organism. In Ohio, the increase in reported cases was particularly striking, from roughly 400 cases per year between 2012 and 2015, to 1940 cases in 2016.
The authors say it's unclear whether the increase in outbreaks reflects an actual increase in cases or rather better surveillance methods. They remind clinicians, "Not swimming when ill with diarrhea is key to preventing and controlling aquatic facility-associated cryptosporidiosis outbreaks." Infected patients should be advised to stay out of the water until they have been diarrhea-free for 2 weeks.