Three other human diseases are caused
by related Treponema pallidum subspecies, including yaws(subspecies pertenue), Pinta(subspecies carateum) and bejel subspecies endemicum.
On January 28, 2008, Galápagos National Park official Victor Carrion announced the killing of 53 sea lions(13 pups, 25 youngsters,
9 males and 6 females) at Pinta, Galápagos Islands nature reserve with their heads caved in.