I hope I can get some reassurance on this matter. Last Friday, I entered a female bathroom cubicle as soon as someone else vacated it and I neglected to check if there was anything on the toilet seat before sitting down to urinate. When I got up, I noticed there were some dried red stains on the seat which may or may not be blood. I'm now afraid that I might have actually sat on fresh blood and the reason why I didn't see the liquid blood was because my buttocks might have rubbed up against it. I was wondering if there was any risk HIV transmission from this action. I didn't check if I had any cuts on the part my buttocks that came into contact with the blood but I would think if there was a deep, open wound that was gushing with blood I'd have felt some sort of pain but I didn't. Was wondering if the HIV virus could be contracted from superficial fresh cuts coming into contact with fresh blood on a surface (this would be the worst case scenario in my situation). Would really appreciate a response on this and whether I need to get myself tested.
Thank you for your inquiry. From what we gather from the question, you were asking about the risk of HIV transmission between a superficial fresh cut and fresh blood on a surface, such as a toilet seat. From the information given, this scenario is determined to be No risk (transmission of HIV is not possible in the given scenario). The scenario mentioned above does not meet the three components of the transmission equation. While HIV can be transmitted via superficial cuts, exposure to oxygen renders the virus inactive and it is not transmissible.
Recommendation: No need for HIV test with the scenario provided, refer to a physician for other health related questions.
Here is a link to the transmission equation that you may find useful: https://www.aidswindsor.org/healthy-me/hiv-transmission/
Regards, AIDS Vancouver Helpline/Online, Steven