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See also:FAVUS (See also:Lat. for See also:honeycomb) , a disease of the See also:scalp, but occur-See also:ring occasionally on any See also:part of the skin, and even at times on mucous membranes . The uncomplicated See also:appearance is that of a number of yellowish, circular, See also:cup-shaped crusts (scutula) grouped in patches like a niece of See also:honeycomb, each about thesize of a split See also:pea, with a See also:hair projecting in the centre . These increase in See also:size and become crusted over, so that the characteristic See also:lesion can only be seen See also:round the edge of the scab . Growth continues to take See also:place for several months, when scab and scutulum come away, leaving a shining See also:bare patch destitute of hair . The disease is essentially chronic, lasting from ten to twenty years . It is caused by the growth of a fungus, and pathologically is the reaction of the tissues to the growth . It was the first disease in which a fungus was discovered—by J . L . Schonlein in 1839; the See also:discovery was published in a brief See also:note of twenty lines in M-iillers Archiv for that See also:year (p . 82), the fungus having been subsequently named by R . Remak •Achorion Schonleinii after its discoverer . The achorion consists of slender, mycelial threads matted together, bearing See also:oval, nucleated gonidia either See also:free or jointed . The spores would appear to enter through the unbroken cutaneous See also:surface, and to germinate mostly in and around the hair-follicle and some-times in the See also:shaft of the hair . In 1892 two other See also:species of the fungus were described by P . G . See also:Unna and See also:Frank, the See also:Favus griseus, giving rise to greyish-yellow scutula, and the Favus sulphureus celerior, causing See also:sulphur-yellow scutula of a rapid growth . Favus is commonest among the poorer See also:Jews of See also:Russia, See also:Poland, See also:Hungary, See also:Galicia and the See also:East, and among the same class of Mahommedans in See also:Turkey, See also:Asia See also:Minor, See also:Syria, See also:Persia, See also:Egypt, See also:Algiers, &c . It is not rare in the See also:southern departments of See also:France, in some parts of See also:Italy, and in See also:Scotland . It is spread by contagion, usually from See also:cats, often, however, from mice, fowls or See also:dogs . Lack of See also:personal cleanliness is an almost necessary See also:factor in its development, but any one in delicate See also:health, especially if suffering from See also:phthisis, seems especially liable to See also:contract it . Before treatment can be begun the scabs must be removed by means of carbolized oil, and the See also:head thoroughly cleansed with soft See also:soap . The cure is then brought about by the judicious use of parasiticides . If the nails are affected, avulsion will probably be needed before the disease can be reached . |
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[back] JULES CLAUDE GABRIEL FAVRE (1809-1880) |
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