Syphilis can have a long lag period for the tests to turn positive. Get tested again at 6 months after exposure. Syphilis window period: https://www.e7health.com/post/155/std-test-window-when-should-i-get-tested/#:~:text=The%20average%20window%20period%20or,it%20develops%20in%20three%20stages. https://www.cdc.gov/std/syphilis/stdfact-syphilis-detailed.htm
Answered 9/24/2022
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Even if truly exposed to syphilis, azithromycin (Z pak) might have aborted it, preventing a test to be positive, However, almost half of all syphilis is resistant to azithromycin. Either way, your negative RPR at 16 weeks is conclusive proof you do not have syphilis.
Answered 8/30/2023
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