PetriKey

Fungus

Cryptococcus neoformans

Encapsulated yeast

KRIP-toh-KOK-us nee-oh-FOR-manz

fungusyeastcapsuleopportunisticindia-ink

High-yield clue

Encapsulated yeast + India ink/cryptococcal antigen vocabulary.

Overview

An encapsulated yeast used to teach capsule visualization, cryptococcal antigen vocabulary, and opportunistic fungal associations.

Classification

  • Fungus
  • Yeast
  • Encapsulated organism

Lab & identification clues

  • Capsule concept
  • India ink historical vocabulary
  • Cryptococcal antigen test concept

Associations

  • Meningitis vocabulary in immunocompromised hosts
  • Bird-dropping environmental association
  • Opportunistic fungal concept

Commonly confused with

  • Candida albicans
  • Histoplasma capsulatum

Your notes

Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.

OpenStax: Microbiology 2e organism classification foundationssourceNCBI Bookshelf: Medical Microbiology organism chapterssourceCDC: CDC disease and public-health topic pagessource