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A member asked:
Rpr was non-reactive 6.5 weeks post exposure risk and 1 week after a sore healed. sore was on penis, began as a tiny red dot under skin, then cracked skin, the .5cmx1cm painless flat ulcer. what is the accuracy at 6.5 weeks considering the sore?
2 doctors weighed in across 2 answers
RPR always becomes positive within 2 weeks of onset of a syphilitic chancre, so the non-reactive result a week after it healed is conclusive. In addition, your description of the sore doesn't suggest a chancre. You can be sure you do not have syphilis.
Answered 1/3/2023
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RPR positive rate at 7 weeks post-infection is close to 35%. Retesting in 2-4 weeks is advised.
Answered 1/3/2023
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