Yaws

Yaws is a chronic, non-venereal infectious disease caused by the spirochete bacterium *Treponema pallidum* subspecies *pertenue*, belonging to the group of endemic treponematoses Transmitted through direct skin-to-skin contact with infectious lesions, the condition primarily affects children aged under fifteen living in warm, humid, tropical forest environments Clinical manifestations evolve across distinct stages, beginning as an initial papilloma or ulcerating "mother yaw" at the site of inocu...

Yaws is a chronic, non-venereal infectious disease caused by the spirochete bacterium *Treponema pallidum* subspecies *pertenue*, belonging to the group of endemic treponematoses

Transmitted through direct skin-to-skin contact with infectious lesions, the condition primarily affects children aged under fifteen living in warm, humid, tropical forest environments

Clinical manifestations evolve across distinct stages, beginning as an initial papilloma or ulcerating "mother yaw" at the site of inoculation, followed by disseminated secondary cutaneous papillomas, hyperkeratosis, and periostitis

If left untreated, late-stage disease can lead to chronic, irreversible destruction of the skin, cartilage, and long bones, resulting in significant joint deformities, contractures, and facial disfigurement