🦠microbiology review

Microsporidiosis

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Microsporidiosis is an infection caused by microsporidia, a group of spore-forming unicellular parasites. It primarily affects immunocompromised individuals, leading to various clinical manifestations.

5 Must Know Facts For Your Next Test

  1. Microsporidia are obligate intracellular parasites that were once classified as protozoa but are now considered fungi.
  2. The most common species causing human infections are Enterocytozoon bieneusi and Encephalitozoon intestinalis.
  3. Microsporidiosis can cause a range of symptoms, including diarrhea, respiratory issues, and systemic infections.
  4. Transmission occurs through ingestion or inhalation of spores from contaminated food, water, or surfaces.
  5. Diagnosis typically involves light microscopy with special stains or molecular techniques like PCR.
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