I did syphilis test 2months back. The level of tpha was 1:320 and RPR was 1:2. Doctor advised me to take doxycycline 100 mg for 21 days twice a day. Then after treatment I repeated test the result was TPHA 1:640 and RPR was 1:2. Then they gave pencillin injection 2.4 mu and asked to repeat the test after 2 weeks. I did test and the result showed TPHA 1:640 again and RPR 1:4 and I did test in another lab their the level of TPHA is 1:2560. I'm very scared please help me.

Your test results indicate a persistent syphilis infection, and the treatment outcomes are concerning; the increasing RPR titers (1:2 to 1:4) and varying TPHA results (1:320 to 1:640 to 1:2560) suggest that the infection may not be responding to the treatments administered; consult a specialist,