Cystoisospora is a topic covered in the Johns Hopkins HIV Guide.

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MICROBIOLOGY

  • Former name: isospora
  • Coccidian protozoal parasite; mature oocysts (30 x 15 μm) sporulate outside host.
  • Sporulated oocysts are infective, sporozoites penetrate enterocytes of small intestice & develop into trophozoites.
  • Transmission occurs by ingestion of contaminated water & food.
  • Endemic in Central & S. America, Africa, & S.E. Asia; in U.S. relatively rare and associated with immunosuppression.

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Last updated: February 1, 2015