PHOENIX , Aug. 21 (UPI) -- A highly contagious parasite has infected and sickened over 100 people in Maricopa County, Ariz., swimming pools since August 4, officials said.
The microscopic parasite cryptosporidium, or "Crypto," was first discovered on August 4 and was found in at least 20 public pools. The infection, induced by ingesting pool water, causes stomach cramps, vomiting and fever, and lasts one to two weeks. It spreads in water contaminated with human fecal material, and is not always killed by chlorine in the water.