cutaneus -dr. hashemi.ppt - iacld.iriacld.ir/dl/modavan/mycology/93/cutaneusdrhashemi.pdf · zblack...

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DermatophytosisDermatophytosisDermatophytosisDermatophytosis(Ring worm or Tinea)(Ring worm or Tinea)

Definition: The cutaneus mycoses by some keratinophilic fungi.p gCaused by: Dermatophytes: MicrosporumMicrosporum, Trichophyton, EpidermophytonEpidermophyton

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Clinical manifestationClinical manifestation

Tinea capitisTnea corporis

Tinea crurisTinea unguiump

Tinea pedisTinea manuum

gTinea barbae

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Tinea CapitisTinea Capitis

Ectothrix (Gray patch)Endothrix (black dots)Endothrix (black dots)Favus

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EctothrixEctothrix

Gray patch tinea capitis is an infection of the hair and scalp.pCaused by: Genus MicrosporumM canisM.canisM.audoiniM.ferroginumM.gypseum

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gyp

Clinical manifestationClinical manifestation

Patches; Smal,slightly erythromatous Configuration; polycyclic and Scales; Branny or powdery.Hair; Lose natural luster, coveredproximally with a white sheat, break off 2-3mm above surface.Kerion;dermatophytic abscess with pus and yellow crust.

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Mycological DiagnosisMycological Diagnosis

Direct examination: KOH 10-20% method or lacto phenol pmount shows; The hair shaft to be evolved by a mosaic sheat composed of thousands of y psmall spores . Septate vegetative hyphae can be demonstrated.Culture: S,S.c and S.c.c Fungal media are inoculated and incubated for 1-3 weeks

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inoculated and incubated for 1 3 weeks.

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EndothrixEndothrix

Black dot tinea capitis is an infection of hair and scalp with Bald patch.p pCause: Some species of the genus TrichophytonSome species of the genus Trichophyton that belonging to anthropophilics.

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Clinical manifestationClinical manifestation

Skin: Erythematous and scaly patchesHair: Lusterless twist break off below theHair: Lusterless, twist, break off below the surface of scalp, alopecia with varying degree of inflamationdegree of inflamation.

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Mycological DiagnosisMycological Diagnosis

Use of a sterile Scalpel or Toothbrush tocollect scaleUse of a pans to collect hairsKOH examination of skin shows septate pvegetative hyphae and arthrospores.Examination of hair by lacto phenol shows, y p ,large spores are produced within the hair sheat.

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FavusFavus

Favus is a disease of hair and scalp, it manifest as distinctive yellow cup-shaped y p pcrusts known as scutula or godet. .Cause:Trichophyton schoenleini

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Mycological diagnosisMycological diagnosis

Direct examination: Non diagnostic septate hyphae can be seen in KOH preparation of yp p pskin. Hyphae grow in chains within the hair and air spaces.pCulture: Inoculation on S and S.c.c Incubation for 1-3 weeks and then,Incubation for 1 3 weeks and then preparing the teased mount or slide culture.

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Tinea CorporisTinea Corporis

Dermatophytosis of body ,Ring worm and circinata.Cause: Trichophyton rubrum,

h i h iT.mentagrophytis var.mentagrophytis T.verrucosum.M if t ti P t h l A l l iManifestation: Patchy scaly, an Annular lesion with central clearing but erythematous border.

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Tinea UnguiumTinea Unguium

Dermatophytosis of nailCause:Cause: T.rubrum,T.shoenleinii, T.mentagrophytisClinical manifestation:Clinical manifestation: Invasive distal, proximal or subungual infection of nailinfection of nailSuperficial onichomycosis by T.menta.

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Tinea pedisTinea pedis

Dermatophytosis of foot, Athlets footCause:Cause: T.rubrum, T menta interdigitalT.menta.interdigital E.floccosum

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Clinical manifestationClinical manifestation

Chronic inter triginousChronic hyper keratotic papulosquamousChronic hyper keratotic papulosquamousSub acute and vesicularA d lAcute and pustularAsymptomatic

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Tinea CrurisTinea Cruris

Dermatophytosis of groin, A special form of tinea corporis.pCause: Epidermophyton floccosumEpidermophyton floccosum T.mentagrophytis t rubrumt.rubrum

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Clinical manifestationClinical manifestation

Annular lesions with central clearingRaised erythematous borderRaised , erythematous borderTendency to spread to the perineum I l i l b k bliInterglutial areas onto buttocks public area

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Tinea BarbaeTinea Barbae

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Microscopical DiagnosisMicroscopical Diagnosis

Microsporum canisM.audoinii

Trichophyton rubrumT.mentagrophytis

M.ferroginumM.nanum

g p yT.verrucsumT.shoenleinii

M.gypseumEpidermophyton

T.violaceumT tosuransEpidermophyton

floccosumT.tosurans

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TreatmentTreatment

Griseofulvin: 500 mg/day .Terbinafine: 250 mg/day

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