How long after the syphilis patient is not infectious, can not be generalized, general syphilis serology test negative or titer long-term fixed at a low level is not infectious, as follows:
If after a sufficient amount of rules of anti-syphilis treatment, patients with stage I syphilis follow-up for 1 year or stage II syphilis patients follow-up for 2 years, syphilis serology test negative, or patients with non-syphilis spirochete antibody titer long-term maintenance in a fixed low level (usually titer ≤ 1:8), after a comprehensive examination to exclude neurosyphilis, etc., can be considered as a cure for the patient, non-infectious.
Patients with stage 3 syphilis, neurosyphilis and cardiovascular syphilis need to be followed up for 3 years or more to determine whether they are infectious or not.
It is usually believed that untreated syphilis is less infectious than 4 years, but it does not mean that it is not infectious.
It is recommended that patients with syphilis go to a regular hospital for examination as soon as possible, and according to the severity of the disease, follow the doctor’s instructions to take the appropriate treatment program.