Small intestine & ampulla

Infectious disorders


Last author update: 1 August 2012
Last staff update: 19 November 2020

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PubMed Search: Cryptosporidium parvum[TI] small bowel

Hanni Gulwani, M.B.B.S.
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Cite this page: Gulwani H. Cryptosporidium. website. Accessed June 3rd, 2023.
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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