Favus
Favus is an uncommon affection these days. Trichophyton schoenleini is the causative fungus. Favus occurs where there is overcrowding and in unhygienic environments, particularly when these conditions are accompanied by rat infestation. The scalp is most frequently affected, the glabrous skin of the neck and trunk and the nails, only rarely.
The salient features are: yellowish cup-shaped crusts embedded in the depressions on the skin (Scptula), mousey odour, and secondary cicatricial alopecia. Scutulum is composed of densely-knitted mycelia.
The diagnosis is confirmed by microscopic demonstration and culture of the fungus, and a Wood's lamp examination.
The prognosis is rather unsatisfactory; scarring and alpoecia are the end results.
Favus Treatment is by the use of fungicidal agents and griseofulvin F.P. as in tinea capitis.
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