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Dermatophytes & Superficial Mycoses

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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  


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Created by: srstetz