(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