Syphilis incubation period 30 years

Syphilis is a systemic sexually transmitted disease caused by Treponema pallidum infection. Most syphilis patients after infection with Treponema pallidum, after a period of incubation period, will show a variety of skin and mucous membrane damage, as well as symptoms of visceral lesions, we call dominant syphilis, their incubation period is generally 2 to 4 weeks or so, on the performance of a damage. But there are quite a number of people, infected with Treponema pallidum, very long without any clinical symptoms, only after blood tests found that there are syphilis antibody positive, we call latent syphilis or recessive syphilis. This time varies, a few years, there are more than ten years or even twenty or thirty years is also some. But they are still infectious, may also turn into dominant syphilis, so still want to active treatment.