<prompt> Regarding yaws, all are true except:Caused by T. pertenueSexually transmittedCross reactive antibodies with syphilisDrug of choice is penicillin  <response>: Ans. is b i.e., Sexually transmittedRef: Anathnarayan, 9the, p. 370, 377 and 8the, p. 377; Harrison, 19the, p. 1132Penicillin is the drug of choice for all treponematosis.Non Venereal Treponemes Mode of transmission - Direct contact not sexual. Endemic syphilis Bejel - Caused by T. pallidum subsp. endemicum. Yaws - Caused by T. pallidum subsp. pertenue. Pinta - Caused by T. pallidum subsp. carateum. In Non-Venereal Treponematosis, Yaws and Pinta gives ve for serological tests for syphilis. 