Syphilis is mainly transmitted by what route

Syphilis is a sexually transmitted disease caused by Treponema pallidum infection, mainly through unclean sex. It is clinically divided into symptomatic syphilis and asymptomatic syphilis. Symptomatic syphilis is divided into primary syphilis, secondary syphilis and tertiary syphilis. Primary syphilis is mainly manifested as hard chancre on the external genitals, a single painless ulcer, accompanied by enlarged inguinal lymph nodes. Secondary syphilis is mainly manifested as a variety of skin and mucous membrane syphilis rash, more common in palms, feet rose spots and anal sites flat condyloma; tertiary syphilis is mainly manifested as skin and mucous membranes, bone joints, internal organs damage. Asymptomatic syphilis clinical no symptoms, after syphilis serological examination can be found.