Small intestine & ampulla
Infectious disorders

Topic Completed: 1 August 2012

Minor changes: 19 November 2020

Copyright: 2003-2021,, Inc.

PubMed Search: Cryptosporidium parvum[TI] small bowel

Hanni Gulwani, M.B.B.S.
Page views in 2020: 1,556
Page views in 2021 to date: 872
Cite this page: Gulwani H. Cryptosporidium. website. Accessed May 8th, 2021.
Definition / general
  • Acid fast protozoa which causes self limited disease in immunocompetent but severe watery diarrhea resistant to most therapy in immunocompromised (J Biomed Res 2012;25:1)
  • Acid fast infective oocyst in stool
Microscopic (histologic) description
  • 2 - 5 micron basophilic spherical structures attached to microvillus surface of epithelium
  • Variable villus abnormality, may have eosinophils infiltrating mucosa
Microscopic (histologic) images

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Various images

Positive stains
Differential diagnosis
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