Even if you had a chancre in the urethra, syphilis would still be detected on a blood test.
I can't say if you need to be worried about it or not, as I don't know your risk factors, but generally, syphilis will show up on a test at 6 weeks, give or take. If you had a high risk encounter, you might want to test again now.
Thanks again for responding. Just another thing-- I took a week's course of Zithromax two weeks post potential exposure - 750 mg 2X / day. I know that you will say if I am concerned, I should get tested, but based on this additional information, what would you say? The zithromax would have taken care of it, if there had been anything, wouldn't it?
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