Is syphilis 1:1 contagious?

Syphilis 1:1 is still infectious, but it may not be infectious. Syphilis is a systemic sexually transmitted disease caused by Treponema pallidum infection. After human infection with Treponema pallidum, the immune system of the body will produce a variety of antibodies against Treponema pallidum, one of which is specific antibody and the other is non-specific antibody. Non-specific antibody is also called cardiolipin antibody or RPR antibody, which is characterized by quantitative expression through titer, and the antibody titer is directly proportional to the activity and infectivity of syphilis, that is, the higher the titer, the stronger the activity and infectivity. Check syphilis titer 1:1, this titer is not high, so the infectivity is not strong, but it cannot be considered as no, just relatively small. It is normal to think that only after treatment, the titer of Treponema pallidum RPR antibody turns negative, the Treponema pallidum in the body is equivalent to being completely killed, and there is no infectivity, so syphilis 1:1 should also pay attention to protection in life, continue to review regularly, to prevent the possibility of infection.