A positive tppa is a positive syphilis spirochete particle agglutination test, and a negative rpr is a negative non-specific syphilis serologic test. In the above cases, the chances of transmission are generally low, but the possibility of infection cannot be completely ruled out. A positive syphilis particle agglutination test suggests that the patient has been infected with the syphilis virus, but a non-specific syphilis serologic test that is not positive for the time being suggests that the chances of transmission are low or that the infection is not contagious. However, a small number of patients with a positive syphilis particle agglutination test may have been recently infected with the syphilis virus and have not yet developed non-specific antibodies. In the above cases, the possibility of contagion cannot be completely ruled out, and a second test is needed to avoid other adverse consequences. In daily life, pay attention to personal hygiene, avoid having unclean sex. If you have symptoms of syphilis or have had high-risk sex, it is recommended that you seek medical attention in a timely manner.