Histoplasma capsulatum – a dimorphic fungus

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• Fungi which exist in 2 separate morphological forms depending of environmental temperature
  • Yeast form within the body or in cultures at 37C
  • in the soil or in cultures at 22C
• Many fungi causing systemic infections are dimorphic fungi

Examples of dimorphic fungi:

• Histoplasma capsulatum
• Sporothrix schenckii
• Blastomyces dermatitidis
• Coccidioides immitis

1. Streptococcus
2. Diseases caused by Clostridium perfringens
3. Diseases caused by Haemophilus influenzae