I am in a 100% monogamous relationship, and have been for about 10 years. Last year, in connection with routine blood tests/checkup, I tested RPR negative. So did my husband of many years. This year, check up showed me RPR positive, undiluted, and FTA-abs positive. My husband was still negative. I was totally incredulous, so we re-did the test at the same lab and got the same results (rpr positive, undiluted, and FTA-abs positive). There is absolutely no chance of third party contact by me in the course of my relationship. Any ideas regarding the reason for these results? These additional facts may be helpful: I have traveled to many, many places with malaria; some years ago, I spent many weeks volunteering in a leper colony treating and dressing wounds, and was definitely exposed to blood during that time period (I know that sounds made up, but it isn't); I have had a lot of unusual, live vaccinations in connection with travel, including Japanese Encephalitis shots, Yellow Fever shots, etc. (but not for the last 7 years or so); and I don't recall ever showing any symptoms related to syphilis. I had major surgery between the last checkup and this year's checkup, but didn't have any obviously evident infections. I have tested negative for Lupus, but haven't tested for all autoimmune diseases on the planet, so I can't speak to any others. So, the question is, any ideas what this rpr negative, turned undiluted positive and fta-abs positive a year later (with intervening travel and surgery) could be about? Thank you in advance.
Vance asked me to help here, and I'm happy to.
My first question is why are you testing for STDs yearly if you are in a monogamous relationship? I don't ask that to be mean, but wondering if there is a reason you think you should test?
Are you pregnant? Pregnancy can cause false positives.
While there are some tropical conditions that can create false positives, such as Yews, I'd wonder why that would just start to happen. Do you know if you ever had yews?
Undiluted does mean 1:1, which as you know, is very low. It suggests an old infection, and some people will always have antibodies. The contradictions come in that you have tested negative in the past, and are now testing positive, and your husband is negative.
Since you tested for lupus, I'd wonder if you have some other health issues happening, and maybe one of those can cause a false positive. I found these from our experts -
http://www.medhelp.org/posts/STDs/Concerns-about-Syphilis/show/249222
http://www.medhelp.org/posts/STDs/Confusion-Over-Test-Results/show/384280
I know I haven't given any firm answers, and I hope I helped. As Vance said, this will likely mean more follow up with your doctor. You can also post in our expert forum if you'd like their advice.
Jess