Hair infection with scutula formation is seen is case of-
<Tinea capitis it is is superficial fungal infection of scalp and hair with dermatophytes . Commonest mycosis in children's Fungus grows over scalp and extend down in hair follicles till zone of keratinisation-adamsons fringe. According to the inflammatory component of clinical presentation tinea capitis classified as Inflammatory-keerion and us Non inflammatory- grey patch and black dot According to size and location of spores Ectothrix-spores outside hairshaft hairs appear dull and grey Endothrix-spores inside hair shaft- hairs break at the follicular orifices appear as black dots on scalp Clinical presentation :four different clinical presentations Grey patch or non inflammatory type:patches of hair loss with broken dull looking hairs.causative organism- microsporum audounii,M.canis,M.gypseum Kerion or inflammatory type : kerion is a inflammatory boggy swelling , indurated tender swelling that is studded with broken ,unbroken hairs , vesicles and pustules. There is sinus formation thick crusting.heals with scarring. Causative organism trichophyton verrucosum and trichophyton mentagrophytes Black dot or non inflammatory type: endothix infection.hairs break at the level of scalp appear as black dot on scalp. Favus: inflammatory type: yellow cup shaped crust composed of dense meat of mycelia and debris-scutula.concavity of cup faces up.endemic in Kashmir. Causative organism T.schoenleinii. Diagnosis: Woods lamp: Bright green fluorescence- M.canis,M.audounii,M.gypseum Dull green fluorescence- T.schoenleinii Direct demonstration KOH mount Treatment Drug of choice for tinea capitis-griseofulvin 15-25mg/kg/day for 2-4 months Other drugs- itraconazole ,fluconazole,terbinafine Topical therapy not effective Antifungal shampoos like ketoconazole and selenium sulphide decrease carrier state. iadvl textbook of dermatology page 254
Tenia Capitis
jock Itch
Tenia glabrosa
Tenia barbae
Fungal infections, Scabies, Pediculosis