Superficial Mycoses11

8/14/2019 Superficial Mycoses11

1/15

Superficial MycosesSuperficial Mycoses))Dermatophytes))Dermatophytes

)Skin Plants()Skin Plants(


2/15

SUPERFICIAL MYCOSESSUPERFICIAL MYCOSES

The superficial mycoses are usuallyThe superficial mycoses are usuallyconfined to the outermost layer of skin,confined to the outermost layer of skin,hair and do not invade living tissues.hair and do not invade living tissues.
http://upload.wikimedia.org/wikipedia/commons/3/34/Skin.jpg


3/15

SUPERFICIAL MYCOSESSUPERFICIAL MYCOSES

Pityriasis versicolorPityriasis versicolorTinea nigraTinea nigra

Black piedraBlack piedraWhite piedraWhite piedraKeratomycosisKeratomycosis


4/15

PITYRIASIS VERSICOLORPITYRIASIS VERSICOLOR

(Tinea versicolor)(Tinea versicolor)Superficial chronic infection ofSuperficial chronic infection of

Stratum corneumStratum corneum Etio:Etio: Malassezia furfurMalassezia furfur

(Pityrosporum orbiculare)(Pityrosporum orbiculare)

(Lipophilic yeast)(Lipophilic yeast) Clinical findings:Clinical findings: HyperpigmentedHyperpigmented

or depigmented maculae on chest,or depigmented maculae on chest,

back, arms, abdomenback, arms, abdomen


5/15

- Characterized by a blotchy discoloration of skinCharacterized by a blotchy discoloration of skinwhich may itch.which may itch.

- Up to 25% of the general population may have this lesion at- Up to 25% of the general population may have this lesion at

any one time.any one time.- Diagnosis is usually possible by direct microscopic- Diagnosis is usually possible by direct microscopic

examination of KOH-treated skin scrapings which show aexamination of KOH-treated skin scrapings which show atypical aspect of mycelia and spores described as "spaghettitypical aspect of mycelia and spores described as "spaghettiand meatballs.and meatballs.


6/15


7/15

PITYRIASIS VERSICOLORPITYRIASIS VERSICOLOR

Treatm.:Treatm.: Topical seleniumTopical seleniumsulfidesulfide

Oral ketaconazoleOral ketaconazoleOral itraconazoleOral itraconazole


8/15

TINEA NIGRATINEA NIGRA

Superficial chronic infection ofSuperficial chronic infection ofStratum corneumStratum corneum

Etio:Etio: HortaeHortae(Exophiala) werneckii(Exophiala) werneckii(pigmented)(pigmented)

Frequent in tropical areasFrequent in tropical areas Clinical findings:Clinical findings: Brownish maculaeBrownish maculae

on palms, fingers, faceon palms, fingers, face


9/15

TINEA NIGRATINEA NIGRA

Micr.:Micr.: Septate hyphae and yeastSeptate hyphae and yeastcells (brown in color)cells (brown in color) Culture:Culture: Black coloniesBlack colonies

Treatm.:Treatm.: Topical salicylic acid,Topical salicylic acid,tincture of iodinetincture of iodine


10/15

BLACK PIEDRABLACK PIEDRA

Fungal infection of the scalp hairFungal infection of the scalp hair Etio:Etio:Piedraia hortaePiedraia hortae

Frequent in tropical areasFrequent in tropical areas Clinical findings:Clinical findings: Discrete, hard,Discrete, hard,

dark brown to black nodules ondark brown to black nodules on

the hairthe hair


11/15

BLACK PIEDRABLACK PIEDRA

Micr.Micr. Septate pigmented hyphae,Septate pigmented hyphae,

and asci; unicellular and fusiformand asci; unicellular and fusiformascospores with polar filament(s)ascospores with polar filament(s) Culture:Culture: Brown to black coloniesBrown to black colonies

Treatm.:Treatm.: Topical salicylic acid,Topical salicylic acid,azol cremesazol cremes


12/15

WHITE PIEDRAWHITE PIEDRA

Fungal infection of facial, axillaryFungal infection of facial, axillaryor genital hairor genital hair

Etio:Etio:TrichosporonTrichosporon(yeast)(yeast) Frequent in tropical andFrequent in tropical and

temperate zonestemperate zones


13/15

WHITE PIEDRAWHITE PIEDRA

Clinical findings:Clinical findings: Soft, white toSoft, white toyellowish nodules looselyyellowish nodules loosely

attached to the hairattached to the hair

Micr.:Micr.: Intertwined septateIntertwined septate

hyphae, blasto- and arthroconidiahyphae, blasto- and arthroconidia

Culture:Culture: Soft, creamy coloniesSoft, creamy colonies

Treatm.:Treatm.: Shaving, azolesShaving, azoles


14/15

KERATOMYCOSISKERATOMYCOSIS

(=Mycotic keratitis)(=Mycotic keratitis) Posttraumatic / postsurgicalPosttraumatic / postsurgical

corneal inf.corneal inf. Etio:Etio: Saprophytic fungiSaprophytic fungi

((AspergillusAspergillus,, Fusarium,Fusarium,

Alternaria, Candida), HistoplasmaAlternaria, Candida), Histoplasmacapsulatumcapsulatum Clinical findings:Clinical findings: Corneal ulcerCorneal ulcer


15/15

KERATOMYCOSISKERATOMYCOSIS

Micr.:Micr.:Hyphae in cornealHyphae in cornealscrapingsscrapings

Treatm.:Treatm.: Surgery (keratoplasty)Surgery (keratoplasty)Topical pimaricinTopical pimaricin

NystatinNystatinAmphotericin BAmphotericin B

Superficial Mycoses11

Documents

Transcript of Superficial Mycoses11