General Information
Cryptosporidiosis (or “Crypto” for short) is a disease that causes watery diarrhea. Crypto is caused by a microscopic parasite called Cryptosporidium. Anyone can get sick with Crypto, but people with weakened immune systems are more likely to have severe and potentially life-threatening symptoms. This includes people who have health problems or take medicines that lower their body’s ability to fight germs and sickness—such as people whose immune systems are weakened because of cancer, an organ transplant or have cancer, or HIV.
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Page last reviewed: December 14, 2021