Cryptosporidium — United Kingdom
A total of 134 recreational water–associated outbreaks were reported by 38 states and Puerto Rico for 2007–2008. These outbreaks resulted in at least 13 966 cases. The median outbreak size was 11 cases (range: 2–5,697 cases). A total of 116 (86.6%) outbreaks were associated with treated recreational water (e.g., pools and interactive fountains) and resulted in 13 480 (96.5%) cases. Of the 134 outbreaks, 81 (60.4%) were outbreaks of acute gastrointestinal illness (AGI); 24 (17.9%) were
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