Text Appearing Before Image: Fig. 534.—Yaws. Note sotrunk involvement. lewhat unusual(Stitt.) Fig. 535.—Yaws.—Secondarylesions. (After Henggeler.) 6. Unlike syphilis yaws does not affect the central nervous systems. 7. The primary lesion of yaws is almost invariably extragenital.Reasons for believing yaws an attenuated syphilis: iii6 MEDICAL DIAGNOSIS i. Monkeys rendered immune to syphilis are immune to yaws, but yawsinfected monkeys are not immune to syphilis (Levaditi and Larrier). 2. Salvarsan is more specific for yaws than for syphilis. 3. Gangosa, probably a tertiary yaws, gives nearly 70 per cent, positiveluetin reactions and yaws yields a higher percentage of positive Wassermanntests than does syphilis. Text Appearing After Image: Despite the authoritative opinion held against the identity of the twodiseases, it would seem possible that with better knowledge the futuremay reverse this decision. GANGOSA (Muffled Voice).—This disease is probably merely a terti-ary form of yaws, nearly all patients showing scars of that disease or admit-ting past infection. GANGOSA—GOUNDU—AINHUM III7 In this ailment or stage the mucous membranes are viciously attacked. Preferentially the destructive process first attacks the soft palate, invadesthe floor of the nasal passages, the nasal septum and the fleshy and cartilag-inous structures of the nose itself, often destroying the eye.
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