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58 Cards in this Set
- Front
- Back
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Pathogen in Tinea cruris commonly associated with epidemics in locker rooms or dormitorries?
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Epidermophyton flocossum
-athroconidia are viable in scale (furniture, rugs, linen) for long periods of time |
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Woods lamps flouresces due to what products?
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pteridine products
Woods lamp ois 365 nm nickel oxide filter |
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DTM turns from yellow to pink in the presence of what kind of dermatophyte products?
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alkaline
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Hyphae nad air spaces within hair and blue-white flurescence on Wood's lamp examination?
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T. schoenleinii
-causes favus--thick yellow crusts of hyphae and skin debris |
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What in the cell walls of dermatophytes have immuno-inhibitory effects?
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Mannans
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A fluorescent stain specific for chitin in the fungal cell wall that often successfully demonstrates fungi with apple-green fluorescence?
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Calcofluor stain
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Triazoles
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itraconazole and fluconazole
(inhibit 14a demethylase) Ketoconazole is an imidazole |
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M/C/ fungal organism from roof of blister?
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T. mentagrophytes
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Organism in erythrasma?
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Corynebacterium minitussimim-gram + rod.
Coproporphyrinogen III |
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Most common cause ot Tinea capitis in the world?
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M. Canis
-T. tonsurans is m/c cause of tinea capitis in the U.S. |
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M/C cause of White Superficial onychomycosis?
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T. mentagrophytes
other causes-FAA Fusarium Acremonium Aspergillus |
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Most common non-dermatophyte for lateral yellow brown discoloration?
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Scopulariopsis brevicaulis
Scytalidium hyalinum (white disc. of nail) and dimidiatum (black discoloration of nail) also non dermatophyte molds that cause onychomycosis |
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pencil shaped macroconidia, teardrop shaped microconidia, white wooly front
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T. rubrum
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Granular front, mahogony reverse, pencil shaped macroconidia with variously shaped microconidia
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T. tonsurans
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Granular front, buff reverse, pencil shaped macroconidia, clusters of round microconidia, spiral hyphae
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T. mentagrophytes
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Convoluted, cream to gray, compact chains of chlamydiospores at 37 degrees C
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T. verrucosum
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Khaki green, suede granular, beaver tail shaped macroconidia with thin walls
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E. floccosum
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Names for white piedra?
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T. beigelli
--(aka-T. ovoides -T. inkin m/c HIV, pubic -T. asahii |
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Dermatophyte class with no microconidia
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Epidermophyton
(E. flocossum-like you can hit somebody with it) (E. Fusarium-banana shaped microconidia) |
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Trichophyton-microconidia vary in size and shape between species....
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T. rubum-bird on a wire
T. menta-spiral hyphae T. tonsurans-tons of different types, various T-shoenlinii-Favic chandeliers |
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M/C with Majocchi's granuloma?
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T. rubrum
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Which type of tinea capitis fluoresce?
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Ectrothrix, microsporum only
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Treatment for Nocardia?
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Sulfonamides
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Endocrine disorder associated with APECED
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Hypoparathyroidism
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M/C type of aspergillus in burn patients?
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A. fusarium
-A. flavus m/c in primary cutaneous disease (appearance like a dandelion)(pretty) on histo |
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Fungi that may present with umbilicated papules in immunosuppressed?
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Crypto
Histo |
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Pectinate bodies?
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Microsporum audouini
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M canis appears similar to M. gypseum except that bodies have?
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More of a tail, more of a point and more bodies than
. gypseum |
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Dimorphic molds
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Blastomyces
Histoplasma Cocciodes Paracoccidiodies Sporothirx |
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Branching Filamentous bacteria
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Actinomyces
Nocardia Streptomyces |
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3 species dermatophytes?
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Microsporum
Trichophyton Epidermophyton |
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Zygomycoses
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Rhizops
Mucor |
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Superficial mycosis of black, firm, adherent concretions 1 mm in diamter on scalp, beard, mustache or pubic areas?
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Black Piedra
-P. hortae |
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Tan, white soft non adherent small concretions < 1 mm in diameter, seen on scalp, beard, mustache, pubic areas?
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White piedra
-T. ovoides, T. inkin, T. beigelii |
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Name the Genus of dermatophyte? Macroconidia smooth walled, club-shaped, 2-6 cells, occurs singly or in clusters, thin and thick cell walls. No microconidia, No hair involvement?
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Epidermophyton
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Microconidia diagnostic, numerous. Macroconidia not distinctive, smooth, thin cell wall, pencil shaped?
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Trichophyton
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Microconidia present but not distinctive. Macroconidia diagnostic, rough walled (cehinulate), multicellular, barrel-shaped, thick cell wall?
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Microsporum
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club shaped, in charactersitic clusters. Colony morphology is khaki colored, orange borwn reverse, radial grooves, velvety?
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E. floccosum
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sptate hyphae with terminal chlamydoconidia with pointed ends. poorly shaped macroconidia. Colony is grey to tan with reverse salmon with reddish brown center, flat surface, "mouse fur appearance"
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M. audouinii
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M/C cause of tinea capitis worldwide?
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M. canis
-thick walled knoblike ends to macroconidia ("dog's tail") -colony is white fluffy, fur like with reverse deep yellow |
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polished rice (+)
geophiliic organism flat powedery colony with cinnamon periphery? |
M. gypseum
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+ hair perforation test?
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T. mentagrophytes
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+ pigment production on cornmeal agar with 1% dextrose
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T. rubrum
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Urease test + red to pink?
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T. mentagrophytes
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requires inositol and thiamine
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T. verrucosum
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T. rubrum (anthropophilic dermatophyte) colony appearance?
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fluffy to granular white, reverse is non diffusible red
KOH-delicated teardrop shaped microconidia laterally on hyphae |
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M/C cause of T. capitis in US?
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T. tonsurans (black dot immunofluorescence)
-partial thiamine requirement |
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Subcutaneous mycosis associated with bottle nosed dolphins?
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Lacaziosis (aka Lobomycosis)
-organism not culturable |
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Cutaneous disease in dog handlers, lab workers. Biopsy shows granulomatous reaction or broad based budding cells, 8-15 um, with thick walls?
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Blastomycosis
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Biopsy: Spherules stain well with PAS, GMS, H and E, 10-80 um containing endospores 2-5 um
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Coccidioidomycosis
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Biopsy of subctuaneous mycosis shows large, thick-walled round cell (5-50 um) with single and multiple buddings (2-10 mm) attached to mother cell by narrow connections?
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Paracoccidiomycosis
(aka brazilian blastomycosis) |
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Subcutaneous fungal infection with molluscum-like lesions?
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Penicilliosis
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M/C opportunistic fungal infections?
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#1-Candida
#2-Aspergillosis (flower like KOH?) |
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2 M/C fungi in burn patients?
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#1-Fusarium (?A hyphpomycosis)
#2-Aspergillus |
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Organisms that are angiotrophic and invasive?
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Aspergillus
Fusarium Zygomycetes |
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Found in stagnant water, Symettrical arrangement of endospores morula, 8-20 um ("soccer ball")?
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Protothecosis
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Spheruls 250-350 um, endospores appear rough like raspberries. Stains red with mucicarmine?
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Rhinosporidiosis
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Most specific stain for Chromoblastomycosis?
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Fontana Masson
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