cryptosporidiosis

pathology

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Last updated

June 26, 2026

Quick Summary

Cryptosporidiosis is an illness caused by the protozoan parasite Cryptosporidium. This parasite lives inside the cells lining the intestines and sometimes the lungs of its host, which can include humans and other mammals.1

The parasite has a life cycle that occurs entirely within a single host. It reproduces asexually, and the resistant cyst stage, called an oocyst, is passed from one host to another. The primary symptoms of cryptosporidiosis are severe diarrhea and vomiting. While most healthy individuals recover quickly without specific drug treatment, the infection can be serious for those with weakened immune systems, such as individuals with AIDS.1

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zoonotic disease
Populations at increased risk
For example, cryptosporidiosis caused by Cryptosporidium parvum, which is transmitted to humans following contact with calves, their manure, or manure-contaminated objects or food, can occur as a coinfection with acquired immunodeficiency syndrome (AIDS). Normally a self-limiting disease, in those with AIDS cryptosporidiosis can cause serious illness, sometimes…
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For example, cryptosporidiosis caused by Cryptosporidium parvum, which is transmitted to humans following contact with calves, their manure, or manure-contaminated objects or food, can occur as a coinfection with acquired immunodeficiency syndrome (AIDS). Normally a self-limiting disease, in those with AIDS cryptosporidiosis can cause serious illness, sometimes…
Read More