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28 Cards in this Set
- Front
- Back
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What is a yeast
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round or oval cells that divide by budding
If elongated buds, called "pseudohyphae" |
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What are pseudohyphae?
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Enlongated yeast buds
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What are molds
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Form of fungi that reproduce sexually
Made of hyphae (septate or aseptate) |
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What is a mycelia
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An aggregate of hyphae
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What are fungal cells made of?
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Chitin and polysaccharides
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What can you stain all fungi with?
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GMS (gomori methanamine silver)
Calcofluor white |
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What fungi can you gram stain?
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Yeasts, candida
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How do you see cryptococcus?
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India ink smear
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What are the 4 major classes of fungi?
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Zygomycetes (aseptate hyphae_
Ascomycetes (Sac fungi) Basidomycetes (Mushrooms, toadstools) Deuteromycetes (imperfect fungi) |
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What are the 4 types of fungal dz?
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Cutaneous (superficial) mycoses
Subcutaneous mycoses Dimorphic systemic mycoses Opportunisitic mycosis |
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What are the superficial fungi?
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Tinea
Dermatophytes |
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What is the media for culturing fungus?
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Sabouraud dextrose agar (SDA),
etc |
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What is the stain used for identifying fungus from a culture?
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Lactophenol cotton blue (LPCB)
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Are there blood tests for fungus?
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Yes
Detection of fungal antigens and metabolites |
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What are the most common fungi of the tropics?
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cutaneous fungal infections (especially dermatophytes)
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What do the dermatophytes infect?
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Keratin (skin, hair, nails)
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What does tinea versicolor look like under the microscope?
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Spagetti and meatballs
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How do diagnose dermatophytes?
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KOH scrapings/clippings
Lactophenol cotton blue mounts for ID |
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What are the 3 genera for dermatophytes?
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Trichophyton spp
Epidermophyton spp Microsporum spp. |
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What can trichophyton infect?
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Hair, skin, nails
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What dot he macroconidia of tricophyhton look like?
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Pencil shaped, smooth walled, non-diagnostic
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What do the microconidia of triichophyton look like?
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Varied morphology, diagnositc
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What do microsporum infect?
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Hair, skin (not nails)
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What doe the macroconidia of microsporum look like?
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Spindle shaped
Rough walled Diagnostic |
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What do microsporum microconidia look like?
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Non-diagnostic
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What do epidermophyton infect?
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Skin, nails (not hair)
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What dot he macroconidia of epidermophyton look like?
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Club shaped, smooth walled, diagnositc
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What do the microconidia of epidermophyton look like?
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Not present
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