An American text-book of genito-urinary diseases, syphilis and diseases of the skin . tiles on the roof of a house, Manson calledthe disease tinea imbricata. Definition.—Tinea imbricata is a contagious, parasitic disease of theskin indigenous to the Malay Peninsula, Philippine, Caroline, and othergroups of islands of the South-west Pacific, and characterized by the forma-tion of concentric circles composed of large epidermic scales which areattached to the subjacent skin at their distal border. The eruption is veryextensive in its distribution, involving at times the trunk, one of the extrem-i
An American text-book of genito-urinary diseases, syphilis and diseases of the skin . tiles on the roof of a house, Manson calledthe disease tinea imbricata. Definition.—Tinea imbricata is a contagious, parasitic disease of theskin indigenous to the Malay Peninsula, Philippine, Caroline, and othergroups of islands of the South-west Pacific, and characterized by the forma-tion of concentric circles composed of large epidermic scales which areattached to the subjacent skin at their distal border. The eruption is veryextensive in its distribution, involving at times the trunk, one of the extrem-ities, or even the whole body surface. Symptoms.—According to Manson, who inoculated several students withthe disease, there appears on the tenth day at the point of inoculation a mi-nute, slightly elevated, brown spot which increases in size until on theseventeenth clay it has attained a diameter of three-eighths of an inch. Atthis time the epidermis splits in the center, becomes detached from the rete,and curls up, while it remains continuous with the normal skin at the mar-. Fig. 283.—Tinea imbricata attacking the back of the hand. gin. Around and beyond the margin there appears a brownish zone slightlyelevated, about one-sixteenth of an inch wide, which Manson says is thefungus proliferating between the corneous layer and the rete, and which isfollowed, as it extends at the periphery, by a curling up of the epidermis, asbefore described. It travels about a quarter of an inch a week. As soon asthe epidermis has re-formed in the center it again takes on the brown color,gives way, and forms a second scaly or pie-crust ring as before. In this man-ner the crescentic waves of the disease spread out and new ones form in thecenter, and, as in Mansons observations, five rings may form in a single 1 Narrative of the U. S. Exploring Expedition, 1844, vol. v. p. 401. 2 Koniger : in Virchows Archiv., 1878, Bd. 72, p. 413. 3 Roux : Traite prat, des Maladies den Pays ehauds, t. iii.,
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