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Final Exam
Mycology: Zygomycetes and Dermatophytes
44
Microbiology
Graduate
04/07/2013

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Cards

Term
Aseptate Hyphae
Definition
Zygomycetes
Term
Septate Hyphae
Definition
Dematiaceous or Hyaline
Term
Septate Hyphae Hyaline
Definition
Dimorphic
Dermatophytes
Others
Term
Zygomycetes characteristics
Definition
Aseptate or sparsely septate
Sporulation occurs in sporangium (sac-like structure) by progressive cleavage
Term
Absidia growth rate
Definition
Rapid, 4 days; inhibited by cyclohexamide
Term
Absidia plate morphology
Definition
Coarse, wooly gray surface; white reverse
Term
Absidia microscopic morphology
Definition
Wide hyphae; sporangiophores: between rhizoids, branched, widen at apophysis, sporangia: small with collerette; sporangiospores: round to oval
Term
Rhizopus growth rate
Definition
Rapid, 4 days; inhibited by cyclohexamide
Term
Rhizopus plate morphology
Definition
Surface: cotton candy-like, 1st white then gray or yellowish brown; reverse: white
Term
Rhizopus microscopic morphology
Definition
Wide hyphae; sporangiophores: opposite rhizoids; usually unbranched & long; sporangia: columella, no collerette; sporangiospores: oval, colorless or brown
Term
Mucor growth rate
Definition
Rapid, 4 days; inhibited by cyclohexamide
Term
Mucor plate morphology
Definition
Surface: cotton candy-like, 1st white the gray; reverse: white
Term
Mucor microscopic morphology
Definition
Wide hyphae; no rhizoids; sporangiophores: long, often branched; sproangia: round, +/- collerette; sporangiospores: round to oblong
Term
Microsporum general characteristics
Definition
numerous thick walled, rough macroconidia; microconidia: usually present (except for M. audouinii; seldom forms conidia)
Term
Trichophyton general characteristics
Definition
rare thin walled, smooth macroconidia; numerous microconidia
Term
Epidermophyton general characteristics
Definition
numerous thick & thin walled, smooth macroconidia; No microconidia
Term
Microsporum audouinii growth rate
Definition
Moderate, 7-10 days
Term
Microsporum audouinii plate morphology
Definition
Surface: flat, downy-silky, gray or tannish; reverse: light salmon with reddish brown center
Term
Microsporum audouinii microscopic morphology
Definition
Hyphae septate with pointed terminal chlamydoconidia, often pectinate hyphae; rare poorly shaped macroconidia; occasional microconidia
Term
Microsporum canis growth rate
Definition
Moderate, 6-10 days
Term
Microsporum canis plate morphology
Definition
Surface: whitish, coarsely fluffy, yellow pigment at periphery, closely spaced radial grooves; reverse: deep yellow turning brown-yellow with age
Term
Microsporum canis microscopic morphology
Definition
Septate hyphae; macroconidia: spindle-shaped, rough, thick walled with knoblike ends, >6 comparments; microconidia: few, club shaped, smooth
Term
Microsporum gypseum complex growth rate
Definition
Moderately rapid, 6 days
Term
Microsporum gypseum complex plate morphology
Definition
Surface: flat, powdery to granular, irregular fringed border, 1st buff, then tan to cinnamon brown; reverse: yellow, orange tan, brownish red or purplish red
Term
Microsporum gypseum complex microscopic morphology
Definition
Septate hyphae; macroconidia: numerous, rough, symmetric, round ends, relatively thin walled, < 6 compartments; microconidia: usually present, club shaped
Term
Trichophyton mentagrophytes growth rate
Definition
Moderate, 7-10 days
Term
Trichophyton mentagrophytes plate morphology
Definition
Surface: varies, buff & powdery or white & downy, concentric & radial folds; reverse: usually brownish tan
Term
Trichophyton mentagrophytes microscopic morphology
Definition
Septate hyphae, coiled spirals; macroconidia: sometimes present, cigar shaped, thin walled, 1-6 cells; microconidia: round, clustered on branched conidiophores
Term
Trichophyton rubrum growth rate
Definition
Slow, 14 days
Term
Trichophyton rubrum plate morphology
Definition
Surface: granular or fluffy, white to buff; Reverse: deep red or purplish
Term
Trichophyton rubrum microscopic morphology
Definition
Septate hyphae; macroconidia: numerous, rare or absent, long, narrow, thin wall, 2-8 cells; microconidia: small tear drop shaped borne laterally on hyphae
Term
Trichophyton tonsurans growth rate
Definition
Moderately slow, 12 days
Term
Trichophyton tonsurans plate morphology
Definition
Surface: variable color, usually suedelike with many radial or concentric folds; reverse: usually reddish brown
Term
Trichophyton tonsurans microscopic morphology
Definition
Septate hyphae, may have spirals & arthroconidia; macroconidia: rare, irregular in form; microconidia: along hyphae or on short conidiophores perpendicular to hyphae, teardrop but may enlarge to round “balloon” forms
Term
Trichophyton schoenleini growth rate
Definition
Slow, 15 days
Term
Trichophyton schoenleini plate morphology
Definition
Surface: whitish, waxy, or slightly downy, heaped or folded; reverse: colorless or yellowish orange to tan
Term
Trichophyton schoenleini microscopic morphology
Definition
Septate hyphae, highly irregular & knobby, antler-like branches; numerous chlamydioconidia; macroconidia: none; microconidia: rare
Term
Identification of Trichophyton species
Definition
Trichophyton agars: series or 7 agars containing different growth factors (inositol, thiamine, nicotinic acid, histidine)
and
Hair perforation test : [T. mentagrophytes (+); T. rubrum (-)]
Term
Epidermophyton floccosum growth rate
Definition
Moderate, 10 days
Term
Epidermophyton floccosum plate morphology
Definition
Surface: brownish yellow to olive gray to khaki, lumpy then folded in center with radial grooves then velvety; reverse: orange to brownish
Term
Epidermophyton floccosum microscopic morphology
Definition
Septate hyphae; macroconidia: thin & slightly thick walled, smooth, club shaped with rounded ends, 2-6 cells, singly or in clusters; microconidia: none
Term
How to ID Absidia
Definition
sporeangiophores between rhizoids, small collerette
Term
How to ID Rhizopus
Definition
Turns yellow on plate, sporangiophores opposite rhizoids, no collerette
Term
How to ID Mucor
Definition
turns gray, no rhizoids, possible collerette
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