Primary papule is pruritic with tender regional lymphadenopathy. Secondary yaws involves the skin, bone, and cartilage; occasionally they ulcerate. Periostitis. Late lesions are hyperkeratotic plaque destructive bony destructive lesions, or gummata.
Person to person.
Treponema pallidum subsp. pertenue, a spirochete.
Benzathine penicillin G 1.2 million units x one.
Where I grew up in NE Portland, there was a restaurant named Yaws. I wonder now just what was in a Yaws Burger.