Fungal and parasitic organisms grouped by class and transmission route, with the key lab or clinical identifying feature for each.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- Which dimorphic fungus is endemic to the Ohio and Mississippi River valleys and associated with bird or bat droppings?
- Histoplasma capsulatum
- Which dimorphic fungus appears as a broad-based budding yeast in tissue and is found in soil?
- Blastomyces dermatitidis
- Which dimorphic fungus forms spherules packed with endospores in infected tissue?
- Coccidioides immitis
- Which dimorphic fungus produces yeast cells budding in a 'captain's wheel' pattern?
- Paracoccidioides brasiliensis
- Which dimorphic fungus causes 'rose gardener's disease' after a thorn prick or traumatic inoculation?
- Sporothrix schenckii
- Which three fungal genera cause tinea (ringworm) infections of skin, hair, and nails?
- Microsporum, Trichophyton, and Epidermophyton
- What microscopic finding on a KOH skin scraping confirms a dermatophyte infection?
- Branching septate hyphae
- Which fungus causes tinea versicolor and shows a 'spaghetti and meatballs' pattern on KOH prep?
- Malassezia furfur
- What lab test identifies Candida albicans by its growth of germ tubes in serum at 37 C?
- Germ tube test
- What hyphal branching pattern is characteristic of Aspergillus fumigatus?
- Septate hyphae branching at acute (45-degree) angles
- What hyphal branching pattern is characteristic of Mucor and Rhizopus?
- Broad, nonseptate hyphae branching at wide (90-degree) angles
- What stain demonstrates the polysaccharide capsule of Cryptococcus neoformans?
- India ink stain
- Which fungus causes diffuse interstitial pneumonia in AIDS patients with a CD4 count below 200?
- Pneumocystis jirovecii
- Which protozoan causes fecal-oral diarrhea and has a trophozoite with two nuclei resembling 'owl eyes'?
- Giardia lamblia
- Which protozoan causes flask-shaped colonic ulcers and liver abscesses with anchovy paste exudate?
- Entamoeba histolytica