An American text-book of the diseases of children .. . the scalp for any length of time, permanentatrophy and loss of hair result. The affection generally begins in childhood,and, untreated, may persist for years or throughout life. The subjective symp-toms are limited to a slight itching. Under the microscope the scutula are seen to be formed almost entirelyof fungus. Etiology.—All those conditions which depress the general nutrition, suchas bad food, foul air, and filthy surroundings, predispose to favus. The dis-ease exists in many of the lower animals—cats, mice, etc.—and it is likelythat
An American text-book of the diseases of children .. . the scalp for any length of time, permanentatrophy and loss of hair result. The affection generally begins in childhood,and, untreated, may persist for years or throughout life. The subjective symp-toms are limited to a slight itching. Under the microscope the scutula are seen to be formed almost entirelyof fungus. Etiology.—All those conditions which depress the general nutrition, suchas bad food, foul air, and filthy surroundings, predispose to favus. The dis-ease exists in many of the lower animals—cats, mice, etc.—and it is likelythat it is often conveyed from these to man. The cause of tinea favosa is theachorion Schoenleinii (Fig. 3), which invades the horny layers of the epidermis,the root-sheaths of the hair especially, and often the hair itself. Recently,Quincke, Unna, and others have separated the achorion Schoenleinii into sev-eral varieties: certain trifling clinical differences in favus may be accountedfor by the presence of one or the other of these forms. Fig. Achorion Schoenleinii (after Kaposi). Microscopically, the fungus of favus is distinguished by the short andjointed appearance of the mycelia, by the rarity of the smooth-borderedmycelia, and by the great number of conidia (Fig. 4). Unna states also thatthe mvcelia of favus grow- at right angles to the strata of the hornv laver ofthe epidermis, while in other fungi the direction is more nearly parallel. Diagnosis.—Only in the beginning, or after the scutula have united intoa large mass will the diagnosis be difficult: here it is necessary to distinguishfavus from eczema, ringworm, psoriasis, seborrhoea. and lupus simplest way of arriving at a definite diagnosis is by an appeal to themicroscope. Prognosis.—The prognosis must be given with care. When upon the 1094 AMERICAN TEXT-BOOK OF DISEASES OF CHILDREN. scalp, if the disease has been of long standing, there will be permanent lossof hair. When apparently cure
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Keywords: ., bookcentury1800, bookdecade189, booksubjectchildren, bookyear1895
