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25 Cards in this Set
- Front
- Back
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Koh or PA stain shows MULTIPLE BRANCHED spetate dark pigmented hyphae and elongated budding cells?
what must these lesions be dddx from? |
tinea nigra
ddx from malignant melanoma or contact dermatitis |
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KOH or PAS stain reveals hair shafts containing conidia w/ white nodules and HYALINE, SPETATE HYPHAE broken up into ARTHROSPORES
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white piedra
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KOH prep shows fragments of mycelium w/ or w/o branches and septa
what may be seen? |
Otomycosis
may see condiophores and conidia or sporangiosphores |
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KOH and PAS show hyphae with microconidia
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*Tinea faciei
*Tinea barbae |
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KOH and PAS show chains of macroconidia and hyphae on HAIR SHAFT
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*Tinea capitis ectothrix
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Conidia and Hyphae seen INSIDE hair shafts on KOH or PAS
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TInea capitis endothrix
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KOH and PAS show mycelia and conidiospores
*club shpaed macrconidia w/ rough walls |
Tinea corporis
club shaped microconidia from microsporum canis |
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hyphae an dmacroconidia seen on PAS or KOH or nail specimen
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tinea unguium
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skin scrapings show masses of hyphae and macroconidia
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Tinea manumm
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PAS and KOH reveal hyphae and cnoidia
some species will exhibit club shaped macroconidia what will not be prodduced |
TInea cruris
epdermophytona and trichophtyon have club shaped epidermophyton foccosum does NOT have microconidia |
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taken from in b/w toes or fingers the PAS and KOH show hyphae and conidia?
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tinea pedis
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KOH and PAS show granules of BROAD, BRANCHING SEPTATE HYPHSE with dense NEUTROPHILIC Exudates occuring as BLACK GRAINS
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Pseudallescheriasis
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PAS show chlamydospores in ASTEROID BODeS and cigar shaped budding yesat forms in pus filled granulomas
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sporotrichosis
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exudates of infected tissues or blood have chains or OVAL to GLOBOSE budding yeast cells or pseudohyphae with constrictions at septa dn w/ oval blstospores near septa
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Candidiasis
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PAS stain shows individual spherical to elongate budding, nonencaspulated yeast like cells
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Rhodotorulosis
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Mehtenamin silver nitrate staining os sputum from bonchoalveolar lavage or a lung bx reveals THICK WALLED CRESCENT SHAPED CYSTS with many INTERNAL BODIES
what is another possible stain test? can this yeast be cultured? |
Pneumocystosis
can also wright stain and direct fluorescent stain CANNOT be cultured |
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nigrosin staining of cerebral spinal fluid or exudate show GLOBOSE yeast cells with THICK polysaccharide capsules fomring hALOS around the cells
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Cryptococcosis
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conidial structures or "ACUTE ANGLE" branching, septate hyphae in PAS or KOH
what other preps can be tested? |
Aspergillosis
preps of sputum or bronchoalveolar lavage |
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PAS prep of tissue exudates shows septate hyphae with oval or spherical arthrospores
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Geotrichosis
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various forms of hyphal elements(branching or non branching hyphae or pseudohyphae) are found on KOH or PAS scrapings of skin or nails
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Onychomycosis
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KOH or PAS shows broad, branching non septate or sparsley setpate hyphae with right angle branching
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Mucormycosis
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KOH, calcofluor white, methenamine silver or PAS stain of tissue prep shows LARGE, BROAD based budding yeast cells
mold forms gorw at romm tem and yeasts grow at 37 degrees C |
BLastomycosis
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KOH or PAS stain of tissue demonstartes thin walled SPHERULES with endospores
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Coccidioiodmycosis
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exudate cells contain extra or intracellular oval yeasts with prominent bud scars and thin walls
fungus is thermally dimorphic |
histoplasmosis
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what indicates an unfavorable dx?
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1. increased complement fixing or precipitating antibody titers
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