After primary syphilis chancre is gone would you definitely test positive?

[leadingman71]

I had a suspected syphilis chancre that showed up 5 weeks after an encounter. It cleared up in 10 days. I have had a non-reactive RPR test at 5 weeks after encounter (when the sore first showed up), then again at 6.5 weeks (after the sore was gone). Also tested negative on TPPA test after 5 weeks and a negative Syphilis health check at 6.5 weeks. Do I still have anything to worry about?

[auntiejessi]

If you had syphilis, and it wasn't treated when you took the test, you would have tested positive. It's also unlikely that a chancre would clear up within 10 days, as they usually take 3 to 6 weeks to go away (unless you've had treatment).

It can take up to 90 days to develop antibodies. It's possible that you hadn't developed antibodies yet.

Did they treat you at the time you had the sore? If they didn't treat you, test again at 90 days to be totally sure, and then you can put it to rest. Most people will test positive by 6 weeks, but a some take longer.

[leadingman71]

Thank you for your reply!
No, they didn't treat. Do you know whether the chancre can clear up without antibodies becoming detectable?

Also, the encounter I had was purely receiving oral. She did not appear to have a chancre in her mouth. Is it possible to catch syphilis (a) with someone who syphilis but the chancre has not yet appeared, or (b) from oral sex with someone whose chancre has cleared up?
Thanks again.