🦠microbiology review

Rhizopus arrhizus (oryzae)

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

Definition

Rhizopus arrhizus (oryzae) is a species of fungi known to cause mucormycosis, particularly affecting the respiratory system. It commonly infects immunocompromised individuals and can lead to severe respiratory issues.

5 Must Know Facts For Your Next Test

  1. Rhizopus arrhizus is a primary cause of pulmonary mucormycosis, which is an aggressive fungal infection.
  2. It primarily affects immunocompromised patients, such as those with diabetes mellitus or undergoing immunosuppressive therapy.
  3. Inhalation of spores is the common route of infection for Rhizopus arrhizus in the respiratory system.
  4. Symptoms may include fever, cough, chest pain, and dyspnea, often resembling other respiratory infections.
  5. Early diagnosis and treatment are crucial; antifungal medications like amphotericin B are commonly used.

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