click below
click below
Normal Size Small Size show me how
Systemic mycoses
Question | Answer |
---|---|
Macrophage filled with Histoplasma (smaller than RBC) | Histoplasmosis |
CXR: bilateral hilar adenopathy, hepatosplenomegaly in a young men that expended the weekend exploring caves down to the Ohio River valleys | Histoplasmosis, Bat droppings |
Culture 25ºC, Broad-base budding doubly refractive wall (same size as RBC), encapsulated | Blastomycosis |
Potassium Hydroxyde (KOH) sputum | Blastomycosis |
Spherule filled with endospores (much larger than RBC) | Coccidioidomycosis (can cause Meningitis) |
Systemic mycoses | All can cause pneumonia and disseminate. All are caused by dimorphic fungi: cold (20°C) = mold; heat (37°C) = yeast. EXCEPTION: coccidioidomycosis, spherule (not yeast) Mimic TB (granuloma formation), unlike TB, no person-person transmission. |
Systemic mycoses | Treatment: fluconazole or itraconazole for local infection; amphotericin B for systemic infection. |