Main » Infectious diseases » Infections Acquired through the Skin and Mucous Membranes » Yaws
Photo 1. Secondary framboesiform yaws. Thanks to a mass penicillin-based eradica- tion campaign, yaws is now a relatively rare disease in the humid tropics. This Papuan child shows classical framboesiform lesions, caused by Treponema pertenue. Secondary lesions are frequent also at muco-cutaneous junctions.
Photo 2. Plantar hyperkeratosis. Hyperkeratosis of feet and hands is a common secondary phenomenon in yaws. This man's feet were seriously eroded.
Photo 3. Gangosa. The most advanced and destructive lesions affect the maxillary bones and hard palate, resulting in a condition known as 'gangosa'.
Photo 4. X-ray of forearm with yaws osteitis. Focal cortical rarefaction and periosteal changes are seen especially in the tibia ('sabre tibia'), but also in other long bones.
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