<prompt> Features of Taenia capitis isare all except:May presents as a boggy swellingMost commonly occurs in elderlyMay present as black dotCaused by trichophyton microsporum but not by epidermophyton  <response>: Ans: B Most... ScutuluirrThe characteristic lesion of favus, appearing as a yellow saucershaped crust made up ofhyphae and spores.- dictionary.thefreedictionary.comTINEA CAPITIS AND TINEA BARBAE iVeena khanna3rd244T.capitis - caused by microsporum any species Trichophyton most species- Ananthanarayan 8606Tinea capitis is dermatophytosis or ringworm of the scalp and hair.Age: invariably a child3 Pattern are recognized: Non-inflammatory broken hair present zls grayblack dot, infammatorykerion-pnesenf as a boggy swelling with multiple discharging sinus Faviscause cicatrical alopeciaAs the hair grows out of the follicle, the hyphae of microsporum species produce a chain of spores that form a sheath around the hair shaft ectothrix. These spores impart a greenish to silvery fluorescence when the hairs are examined under Woods light 365 nm.In contrast, T tonsurans, the chief cause of black dot tinea capitis, produces spores within the hair shaft endothrix. These hairs do not fluoresce; they are weakened and typically break easily at the follicular opening. In prepubescent children, epidemic tinea capitis is usually self-limiting.Zoophilic species may induce a severe combined inflammatory and hypersensitivity reaction called a kerion.Another manifestation of tinea capitis is favus, an acute inflammatory infection of the hair follicle caused by T schoenleinii, which leads to the formation of scutula crusts around the follicle. In favic hairs, the hyphae do not form spores but can be found within the hair shaft.Table :Some Clinical Features of Dermatophyte InfectionSkin DiseaseLocation of LesionsClinicalFungiTinea corporis ringwormNonhairy, smooth skin.Circular patches with advancing red, vesiculated border and central scaling. Pruritic.T rubrum, E floccosumTinea pedis1 athletes footInterdigital spaces on feet of persons wearing shoes.Acute: itching, red vesicular. Chronic: itching, scaling, fissures.T rubrum, T mentagrophytes, E floccosumTinea cruris jock itchGroin.Erythematous scaling lesion in intertriginous area. PruriticT rubrum, T mentagrophytes, E floccosumTinea capitisScalp hair. Endothrix: fungus inside hair shaft. Ectothrix: fungus on surface of hair.Circular bald patches with short hair stubs or broken hair within hair follicles. Kerion rare. Microsporum- infected hairs fluoresce.Tmentagrophytes, M canisTinea barbaeBeard hair.Edematous, erythematous lesion.T mentagrophytesTinea unguium onychomycosisNail.Nails thickened or crumbling distally; discolored; lusterless.Usually associated with tinea pedis.T rubrum, T mentagrophytes, E floccosumDermatophytid id reactionUsually sides and flexor aspects of fingers. Palm. Any site on body.Pruritic vesicular to bullous lesions. Most commonly associated with tinea pedis.No fungi present in lesion.May become secondarily infected with bacteria. 