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Mycology 2
Dermatophytes & Superficial Mycoses
| Question | Answer |
|---|---|
| How do most dermatophyte infections present? | - Infections of the skin, nails, and hair follicles - "Ringworm" - rash at site of infection |
| What nutritional requirements can differentiate Trichophyton species ? | Growth on agar/broth containing Casein (protein) and thiamine - Some will only grow in presence of thiamine |
| What is the best sample to detect Malassezia furfur? | KOH skin scrapings - look for "spaghetti and meatballs" apprearance |
| Which of the dematophyte species infects the skin and hair? Skin and nails? All 3? | - Skin and hair: Microsporum - Skin and nails: Epidermophyton - Hair, skin, and nails: Trichophyton |
| How do the macroconidia appear in the dermatophytes? The microconidia? | Macroconidia: - Microsporum: Many "spindle shaped", rough walls - Trichophyton: Few "bat shaped", smooth walls - Epidermophyton: "shoe shaped", smooth thin walls Microconidia: - Microsporum: Few/rare - Trichophyton: numerous - Epidermophyton: none |