Syphilis Transmission Risks and Precautions After Contact - Urology

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Transmission routes of syphilis?


Hello, Doctor: Recently, I had contact with a syphilis carrier.
I touched his chest and abdomen before masturbating, but it was dark, and I didn't notice if he had any rashes on his body.
I would like to ask the doctor: (1) Is there a risk associated with this situation? (2) Could sweat from the other person be a potential route of transmission? (3) Since the other person touched his genitals and then touched my clothing, is it possible for syphilis bacteria to remain on the fabric, and is regular cleaning sufficient to eliminate any risk? Thank you for your response, Doctor.

Brian, 20~29 year old female. Ask Date: 2020/07/09

Dr. Du Shixi reply Urology


Hello: 1) There is a risk with any contact, but the risk of non-sexual behavior is extremely low.
2) Sweat is not a transmission route.
3) There is no infection of this kind; you can refer to https://www.cdc.gov.tw/Category/ListContent/BcwrIdNHhlziwBeJq9UJ7Q?uaid=1TI7GoOkq9v7X-lr2QtYog.

Reply Date: 2020/07/09

More Info


When it comes to understanding the transmission risks associated with syphilis, it is crucial to consider several factors, including the nature of contact, the presence of visible symptoms, and the potential for indirect transmission through surfaces or clothing.
1. Risk of Transmission: Syphilis is primarily transmitted through direct contact with syphilis sores, which can occur during sexual activity. If you had skin-to-skin contact with a person who is infected, particularly in areas where sores may be present (such as the chest and abdomen), there is a potential risk of transmission. However, the risk is significantly higher if there are open sores or lesions involved in the contact. If the contact was merely touching without any visible sores or lesions, the risk is lower, but not entirely negligible. It is important to monitor for any symptoms that may arise in the following weeks, as syphilis can have a long incubation period.

2. Sweat as a Transmission Route: Sweat itself is not a known transmission route for syphilis. The bacteria that cause syphilis, Treponema pallidum, are primarily found in sores and lesions. While bodily fluids can carry the bacteria, the risk of transmission through sweat is extremely low. The bacteria do not survive long outside the human body, and thus, casual contact through sweat is not considered a significant risk factor for transmission.

3. Contamination of Clothing: Regarding the concern about clothing potentially being contaminated after contact with an infected individual, it is important to note that Treponema pallidum does not survive well outside the human body. If the infected person touched their genitals and then touched your clothing, the risk of transmission through clothing is very low. Standard washing methods should suffice to eliminate any potential bacteria. Washing your clothes in hot water with detergent is generally effective in removing any pathogens.

In summary, while there is a potential risk of syphilis transmission through direct contact with an infected individual, the likelihood of transmission through sweat or contaminated clothing is minimal. It is advisable to remain vigilant for any symptoms, such as sores or rashes, that may develop in the weeks following the exposure. If you have concerns or begin to notice any symptoms, it is important to seek medical advice and consider getting tested for syphilis and other sexually transmitted infections (STIs). Regular STI screenings are a good practice, especially after potential exposure to an infected individual.
Additionally, practicing safe sex, including the use of condoms and dental dams, can significantly reduce the risk of transmission of syphilis and other STIs in the future. Education about the signs and symptoms of syphilis can also empower individuals to seek timely medical attention if they suspect exposure.

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