smitted infectionHow can the spread be prevented?A B C1. EtiologySyphilis is caused by the delicate spirochaetal anism:Treponema-pallidum2. How is syphilis spread?three ways1)in adults through sexual intercourse when contact is made with infectious lesion.2) Other subjects :identally – infectious lesionor laboratorians handing infected animals.Transmission following transfusion of blood from a syphilitic donor3) an infant --infected in uterus --also occur in infants from contact with an infectious lesion3. Stage1)acquired syphilis:2)congenital syphilis:??1)acquired syphilis: -- early stage: primary(first) < 2 years secondary--tertiary (late)stage: > 2 years--latent phase: detected only by the presence of a reactive serologic test.