Syphilis is not infected within the titer of 1.2

Syphilis is a sexually transmitted disease, the preferred long-acting penicillin treatment, after treatment detection syphilis titer turned negative, indicating that the clinical cure, then there is no infectivity. But there are also some patients after treatment, the titer did not completely turn negative, then low if relatively low, after 2 years, the titer did not rise, this is also not infectious, the general test titer within 1.2, more will not be infected, but still need to do a good job of reexamination.