If syphilis is positive, it is usually contagious. Because the syphilis spirochete can form certain antibodies after infecting the human body, if the test is positive for syphilis spirochete antibodies, it means that the syphilis spirochete has been infected, so this case is definitely contagious. This disease is usually transmitted through sexual contact, but in addition to this way, it can also be transmitted through the blood, as well as mother-to-child vertical transmission. For this disease, if you find a positive test, you need to promptly carry out anti-syphilis treatment, because once infected, syphilis patients may cause secondary damage to internal organs and so on.