Text Appearing Before Image: Fig. 531.—Yaws.—Initial lesion on breast of mother. General infection (secondarystage) in child. (After Henggeler.) 1114 MEDICAL DIAGNOSIS Three stages. Incubation. The Mother yaw. Lymphnodes. Feverandjeruption. Preferentialsites. (Castellani) and characterized by papular, tubercular and ulcerative skinlesions, appearing in three stages like syphilis, the tertiary phase, only, pro-ducing the deeper ulcerative lesions. Initial Lesion.—After a period of incubation averaging three weeks,nocturnal headache, dyspeptic symptoms, joint pains and an irregular feverusher in the primary effect in the form of single or multiple papules at thesite of inoculation. Superficial fissuring ulcerations follow, exposing a rasp-berry-like base of sluggish fungoid granulation (the mother yaw) exudinga seropurulent discharge. Tenderness and enlargement of the lymph nodes may accompany orshortly precede the appearance of the primary lesion which is almost in-variably extragenital. Text Appearing After Image:
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