I want to ask what stage of syphilis is 1:16

1:16 is generally secondary syphilis, but also according to symptoms to judge. If there are no symptoms, may be latent syphilis. Recessive syphilis is also infectious, need active treatment, otherwise it will develop into dominant syphilis. Sexual partners should also be serological testing for syphilis. If syphilis is found, it should also be treated at the same time.