Table 1. Comparative Features of Nonvenereal Treponematoses

 

Treponematose	Geographical distribution	Mode of transmission	Site of disease	Incubation period	Primary lesions	Secondary lesions	Tertiary lesions
Yaws	West & Central Africa Southeast Asia Central & South    America	Person to Person	Skin, bone, cartilage, lymph nodes	9-90 days (3 weeks)	Common	Common	Common
Pinta	Central & South   America	Person to person	Skin	3 days - 2 months (2-3 weeks)	Common	Common	Common
Bejel	Saudi Arabia, Africa (Sabel)	Person to person	Skin, bone, cartilage, lymph nodes	3 weeks	Rare	Common	Common