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6 Cards in this Set

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What is Cryptosporidium?
It is an intestinal protozoan of the apicocomplexan type that infects a variety of mammels and birds. It is a zoonosis.
What is its pathogenesis?
Humans accidently ingest the oocysts with water or food.
The oocyst excysts once inside the intestines and releases sporozoites that attach to the epithelium of the small intestine. It lives intracellularly and undergoes asexual and sexual reproduction in the gut and produces more oocysts which are excreted from the host.
The oocysts are highly infectious and extremely resistant to treatment with chlorine and other disinfectants. TRUE/FALSE
TRUE.
AIDS patients may experience chronic persistent cryptosporidial diarrhea. TRUE/FALSE
TRUE. This is often used as a criterion to help diagnose the disease.
How is cryptosporidium found?
It can be detected in fecal samples with indirect immunofluorescence and by acid fast staining of biopsy tissues.
In 1993, 370,000 people developed Cryptospridium gastroenteritis from the municipal water supply in Milwaukee. TRUE/FALSE
TRUE.