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Mycology 2

Dermatophytes & Superficial Mycoses

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
Created by: srstetz