During initial infection, the fungal spores would appear to enter through the unbroken cutaneous surface, and to germinate mostly in and around the hair follicle and sometimes in the shaft of the hair. Species
Favus is the first human fungal disease in which a fungus was definitely identified by J. L. Schönlein in 1839. The discovery was published in a brief note of twenty lines in Müllers Archiv for that year (p. 82). In 1841, the Hungary-born French physician David Gruby independently described the fungus associated favus. The fungus was subsequently named by Robert Remak as Achorion schoenleinii in honor of its discoverer. In 1892, two additional "species" of the fungus were described by Paul Gerson Unna, the Favus griseus, giving rise to greyish-yellow scutula, and the Favus sulphureus celerior, causing sulfur-yellow scutula of a rapid growth. This was in the days before scientists learned to rigorously distinguish microorganism identities from disease identities, and these antique, ambiguous disease-based names no longer have status either in mycology or in dermatology today. Similar looking infections, sometimes diagnosed as favid but more often as atypical inflammatory tinea, may be caused by more common dermatophyte infections, in particular Microsporum gypseum, the most common soil-borne dermatophyte, and Trichophyton quinckeanum. The latter was previously called Trichophyton mentagrophytes var. quinckeanum, the agent of mouse favus infection.
Treatment
Up until the advent of modern therapies, favus was widespread worldwide; prior to Schönleins recognition of it as a fungal disease, it was frequently confused with Hansens disease, better known as leprosy, and affected Europeans were sometimes committed to leprosaria. Today, due to this species high susceptibility to the antifungal drug griseofulvin, it has been eliminated from most parts of the world except rural central Asia and scattered rural areas of Africa. It is mainly a disease connected to demographic poverty and isolation, but is so readily treatable that it is among the diseases most likely to be eliminated by modern medicine. References

This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Favus". Encyclopædia Britannica. Vol. 10 (11th ed.). Cambridge University Press. p. 215. Kane, J., R.C. Summerbell, L. Sigler, S. Krajden, G. Land. 1997. Laboratory Handbook of Dermatophytes: A clinical guide and laboratory manual of dermatophytes and other filamentous fungi from skin, hair and nails. Star Publishers, Belmont, CA. Gräser Y, Kuijpers AF, Presber W, De Hoog GS (October 1999). "Molecular taxonomy of Trichophyton mentagrophytes and T. tonsurans". Med. Mycol. 37 (5 Cpages=315–30): 315–30. doi:10.1046/j.1365-280x.1999.00234.x. PMID 10520156. == External links ==