Can syphilis be transmitted through saliva?

Syphilis can be transmitted through saliva, but the probability of this infection is relatively low.

Although Treponema pallidum mainly exists in the patient's blood, skin lesions and other parts, but saliva may also carry a small amount of Treponema pallidum. Transmission through saliva usually requires close and long-term contact, such as a long kiss. And even if there is saliva contact, it does not necessarily occur infection, which is related to many factors such as the way of contact and the immunity of the contact person. In addition, saliva transmission is not the main mode of transmission of syphilis compared with sexual contact and vertical transmission from mother to child. Sexual contact is the most important transmission route of syphilis. In addition, transmission from mother to child through placenta and birth canal is also common.

For people with suspected saliva contact history, if they are worried about syphilis infection, relevant tests can be carried out, such as syphilis serological tests, for early detection and diagnosis.