Can Urine Carry STD Pathogens? Infection Risks - Urology

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Can urine carry sexually transmitted infection (STI) pathogens?


Can urine carry sexually transmitted pathogens? A few days ago, I had to use a public restroom in my apartment building and sat on a toilet seat that had some urine residue that wasn't completely dry.
I used wet tissue to clean it and then dried it with clean tissue, repeating this process 2-3 times before I could use the toilet.
If I had a small cut, what is the risk of contracting a sexually transmitted infection, such as HPV, syphilis, or gonorrhea? Additionally, I have some sebaceous gland hyperplasia at the base of my penis that my doctor previously said was nothing to worry about as long as I maintain cleanliness.
Recently, one of these bumps turned red but hasn't increased in size and doesn't cause discomfort.
Should I just continue to clean and monitor it, or should I seek medical attention?

Ho, 20~29 year old female. Ask Date: 2020/08/01

Dr. Du Shixi reply Urology


Hello: 1) Sexually transmitted infections (STIs) are transmitted through sexual intercourse.
2) If there has been a recent incident of unprotected sexual activity, it is important to seek medical attention.
Wishing you good health.

Reply Date: 2020/08/01

More Info


Urine is generally not considered a vector for sexually transmitted disease (STD) pathogens. Most STDs, such as gonorrhea, chlamydia, syphilis, and human papillomavirus (HPV), are primarily transmitted through sexual contact, including vaginal, anal, and oral sex. The pathogens responsible for these infections are typically found in bodily fluids such as semen, vaginal secretions, and blood, rather than urine.

In your situation, using a public toilet seat that may have had urine residue does not pose a significant risk of contracting STDs. The pathogens that cause STDs are not typically viable outside of their host for extended periods, and the likelihood of transmission through contact with a toilet seat is extremely low. Additionally, the act of wiping with tissue, even if it was damp, further reduces any potential risk, as it does not provide a conducive environment for pathogens to enter the body.

However, if you have any open wounds or cuts on your skin, it is always wise to be cautious. While the risk of infection from a toilet seat is minimal, open wounds can increase susceptibility to various infections, including those caused by bacteria present in the environment. If you are concerned about any potential exposure or if you develop symptoms such as unusual discharge, pain, or irritation, it is advisable to consult a healthcare provider for further evaluation.

Regarding the bumps you mentioned at the base of your penis, it is important to monitor any changes in size, color, or sensation. The fact that one of the bumps has changed color to red but has not increased in size or caused discomfort may not be a cause for immediate concern, especially if a healthcare professional has previously assessed it and deemed it benign. However, any new or changing skin lesions should be evaluated by a healthcare provider to rule out any potential issues, including infections or other dermatological conditions.

In summary, the risk of contracting STDs from urine on a toilet seat is very low, and your current symptoms regarding the skin lesions should be monitored. If you have any doubts or if the lesions change, seeking medical advice is always a prudent course of action. Regular check-ups and open communication with your healthcare provider can help ensure your sexual health and overall well-being.

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