The ready reference handbook of diseases of the skin / By George Thomas Jackson, ... With 99 illustrations and 4 plates.

Date:
1906
Catalogue details

Licence: In copyright

Credit: The ready reference handbook of diseases of the skin / By George Thomas Jackson, ... With 99 illustrations and 4 plates. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    up of the follicle by extraneous matter, but to a hyperker- atosis closing up the follicle mouth, and the black head is due to degeneration of the compressed horny cells. Unna, Sabouraud, and Gilchrist each describe a special organism as the cause of acne. Unna found a flask bacillus and a diplococcus, and another bacillus. Sabouraud describes still another bacillus as the cause of the disease, and believes that the invasion of the follicles infected by staphylococci of gray culture produces the pustular form. Gilchrist’s bacillus acnh is ])yogenic. Both Sabouraud and Gilchrist teach that the seborrhoeic skin is the proper ground for infection by their micro-organisms. It seems evident, therefore, that the disease is parasitic, and this theory best explains the course of the disease. As one grows older the character of the skin changes, so that it is no longer a proper habitat for the organisms, just as in ringworm of the scalp, which undergoes spontaneous recovery after puberty is reached. In all pustular lesions the common forms of staphylococci are found. Diagnosis. Acne is to be differentiated from rosacea, papular and pustular eczema, sycosis, the small pustular and tubercular syphiloderra, and variola. Rosacea is due to a dilatation of the blood vessels, and is attended by hypersemia and telangiectases. If there are any pustules, they are superficial, and if excised give exit to only a drop of pus. Acne is a disease of the sebaceous glands, and papules and pustules constitute the disease. They are often large, and if excised will give exit to a plug of sebaceous matter and thick pus. Rosacea, as a rule, occupies the middle third of the face alone, the fore- head, nose, and chin. Acne is scattered over the whole face, and is often found on the shoulders. Papulai' eczema may occur at any age; acne usually oc- curs between the ages of fifteen and twenty-five. Papular eczema rarely is seen on the face alone, and is prone to attack the trunk and extremities ; acne often occurs on the face alone, and is never disseminated over the limbs and trunk. In eczema there is an absence of comedones; the papules are often surmounted by or change into vesicles;
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