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Cryptosporidium

Cryptosporidium


Cryptosporidiosis is a disease caused by the parasite Cryptosporidium parvum, which was first recognized as causing disease in humans in 1976. Few people had heard of cryptosporidiosis until 1993, when over 400,000 people in Milwaukee, Wisconsin became ill with diarrhea after drinking water contaminated with the parasite. The Cryptosporidium parasite is protected by an outer shell that allows it to survive outside the body for long periods of time and makes it very resistant to chlorine-based disinfectants.