Easy Points: Micro - Superficial and Cutaneous Mycoses

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orcl777
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252808
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Easy Points: Micro - Superficial and Cutaneous Mycoses
Updated:
2013-12-12 10:55:23
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Micro mycoses olfu2016
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Micro
Description:
Micro: Superficial and Cutaneous Myscoses
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  1. Superficial mycoses affect which layers of the skin?
    Stratum corneum
  2. Superficial mycoses affect which layers of the hair?
    Cuticle
  3. Found areas of the body rich in sebaceous glands
    Pitynasis versicolor
  4. Lesion: hypopigmented or hypopigmented macular lesion that scale readily giving it a chakly appearance; occurs most frequently on the upper torso of the body
    Pitynasis versicolor
  5. Etiologic agent: Malssezia furfur
    Pitynasis versicolor
  6. Clinical diagnosis: microscopic examination of skin scrapings; "spaghetti and meatballs"
    Pitynasis versicolor
  7. Appearances; cultures are not routinely done to confirm diagnosis
    Pitynasis versicolor
  8. Clinical feature: lesions are described as well demarcated gray to black macular areas found on the palmar and plantar areas of the stratum corneum
    Tinea nigra
  9. Etiologic agent: Exiophilia werneckii
    Tinea nigra
  10. Clinical diagnosis: septate hyphae and budding yeast cells
    Tinea nigra
  11. Clinical feature: hard black nodules found along the hairshaft; affects scalp hair
    Black piedra
  12. Etiologic agent: Piedraia hortae
    Black piedra
  13. Clinical diagnosis: asci and ascospores
    Black piedra
  14. There is development of cream soft pasty growth along the infected hair shaft; affects the hairs of the axilla, bread, moustache, pubic and scalp
    White piedra
  15. Etiologic agent: Trichosporon beigeli
    White piedra
  16. Clinical diagnosis: sleeve-like collarette around the hair shaft
    White piedra
  17. 3 Genera of cutaneous myscoses
    • Trichophyton
    • Microsporum
    • Epidermophyton
  18. Infects the skin, hair and nails
    More micronidia than macronidia are formed
    Tricophyton
  19. Grape-like clusters of micronidia on terminal branch
    T. mentagrophytes
  20. Teardrop shaped micronidia
    T. rubrum
  21. Clavate micronidia
    T. tonsurans
  22. Favic chandelier
    T. schoenleini
  23. Infects the skin and hair only
    More macronidia than micronidia are formed
    Microsporum
  24. Macronidia have curved or hooked spiny tip
    M. canis
  25. Thinner walled macronidia
    M. gypseum
  26. Thick walled chlamydospores
    M. audouinii
  27. Invade the skin and nails
    E. floccosum
    Fuseaux in banana branch
    Epidermophyton
  28. Foot; infected with trichophyton and epidermophyton
    Tinea pedis
  29. Skin of the body; infected with Microsporum, Trichophyton, and Epidermophyton
    Tinea corporis
  30. Groin; infected with Trichophyton and Epidermophyton
    Tinea cruris
  31. Scalp and hair; Endothrix infection - spores seen inside hair shaft; Trichophyton spp
    Ecthothrix infection - spores surrounding the hair shaft; Microsporum spp.
    Tinea capitis
  32. Beard; infected with Trichophyton
    Tinea barbae
  33. Hair infection caused by T. schoenleine; has a waxy mass of hyphal elements surrouding the base of the hair follicle at the scalp line.  Microscopic examination of the hair reveals degenerated hyphal elements coursing throughout the hair shaft.  Such hairs are called favic and are diagnostic of the infection
    Favus
  34. Dissolves skin, nail scrapings
    KOH prep
  35. With calcoflour white prep, you will see branching septate, hyphal elements in these tissues
    Skin, nail
  36. With calcoflour white prep, you will see ectothrix or endothrix infection in this tissue
    Hair
  37. Agar used for culture
    Sabouraud's dextrose agar (at room temperature)

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