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19 Cards in this Set
- Front
- Back
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Describe the culture and microscopy of microsporum canis.
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long spindle macroconidia with terminal knob often seen
5-15 cells with most oftenn more than 6 some microconidia seen wart like protusions from thick walls in macroconidia flat mycelium groth in 2-3 days matures in 6-10 days culutre is often white flat mycelial growth with yellow reverse scalp lesion/lesion swab |
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What does Microsporum canis cause? who is it acquired from?
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- infections of the scalp and skin, sometimes nails
- dogs and cars - clinical presentation - scaling erythematous borders, can be crusting, or cause of suppurative folliculitis - kerion - ecto thix infection |
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What is the clinical picture of the Microsporum canis?
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Kerion
suppurative folliculitis scalp lesion swab raised erythematous advancing borders xudate |
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Describe the culutre growth of Microsporum canis
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non pigmented strains can occur
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Describe Microsporum gypseum
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Describe the microscopic picture of M. gypseum
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- septate hyphae
- +++ macroconidia - symmetirc rought - thin walls with =/>6 compartments - rounded ends - microconidia club shaped ususally along hyphae |
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Differentiate M. gypseum from M. canis microscopically
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What is the pathogenicity of M gypseum?
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Describe the colonial morphology of M. gypseum
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- surface flat and spreading
- powdery/granular - irregular fring border - buff --> tan ---> cinnamon brown |
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Describ the morphologyical appearance of epidermophyton floccosum
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khaki
suede finge raised folded centre flat periphery yellowish brown reverse present growth in 1 week |
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Describe microscopic morphology of Epidermophyton floccosum
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septate hyphae
chlamydospores forming chains from hyphae in older cultrues thin smooth walled long macroconidia no microconidia 7 - 12, 20 -40um |
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What are the clinical symptoms of Epidermo floccosum
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Describe Thrichophyton verrucosum
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zoophilic
cows KOH demonstrate hyphae tiniae barbae --> head and neck also forearms |
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Describe Thrichophyton verrucosum microscopy
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When is growth fastest for T. verrucosum?
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Describe T. soudanese
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now occasional isolate would wide
tinia capitis in africa flat orange isolate mainly submered fringe slow growing endothrix |
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Describe Trichophyton tonsurans
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- causes tinea capitis
- endotrhix meaning spores are in the hair follicle - growth in 1 week - yellow brown colony - clavate and pyriform microconidia - balloon microconidia chlamydoconidia present |
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Describe T. violaceum
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Constuct a table of dermatophytes
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