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