The parasites can live in the water and infect other swimmers who swallow it or get their lips wet. Anyone can get a cryptosporidium infection. People at greatest risk for severe illness are those with weakened immune systems such as people with HIV infection, on chemotherapy or on high-dose steroid therapy after organ transplantation. Cryptosporidiosis is diagnosed by identifying the parasite in a stool sample. There is no specific treatment that is recommended for cryptosporidiosis.
Fluid replacement is needed if dehydration is a problem.
There are some drugs currently being tested for persons with weakened immune systems. Consult your health care provider for more information. Wash your hands after contact with cattle. Avoid drinking raw mile, other unpasteurized dairy products or apple cider made from unwashed apples. Do not drink directly from streams, brooks or lakes when hiking or camping.