The 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 disinfection. Symptoms generally begin 2-10 days after being infected. Symptoms include diarrhea, loose or watery stool, stomach cramps, upset stomach, and a slight fever.
Some people have no symptoms.
Once you feel better, you continue to pass Cryptosporidium in your stool for up to 2 months. During this 2-month period you may spread the infection to others . If you have a severely weakened immune system, you are at risk for more serious disease. Your symptoms may be more severe and could lead to serious or life-threatening illness. If you have a severely weakened immune system, consult with your health care provider for additional guidance.