<prompt> All of the following statements about yaws are true, except:Caused by Treponema paeunaeTransmitted non venerallySecondary yaws can involve boneLate stages of yaws involve hea and nerves  <response>: Late Yaws is characterized by destructive and deforming lesions of skin, periosteum and bone. The late cardiac and cerebral manifestations of venereal syphilis, which is often severe, does not occur in yaws. Ref: Preventive and Social Medicine, by K.Park, 19th edition, Page 283, 284 