I am a straight male.
On the 13th of December, I went to see a urologist as I had had some UTI-type symptoms for a week or so (I didn't suspect Chlamydia or any STD for that matter at the time, as I have had few sexual partners, and always use condoms - also not a big fan of receiving oral sex). The urologist immediately suspected chlamydia due to particles of puss on the glans and prescribed me with Clarithromycin for 14 days while getting a urine sample (which came back positive for chlamydia a few days later). I didn't have sex or any sexual contact since the 13th of December, and contacted my previous partners about this. My girlfriend got a chlamydia test done (results coming today) and was put on Azithromycin single dose to be sure.
I felt better after the treatment, but was in shock at having contracted an STI, despite being quite serious about sexual activities. So on December 27th (4 days after the end of the clarithromycin antibiotics) I used a reputed mail tester in Japan for a variety of STDs (providing samples of blood, urine, and throat sample obtained from gargling a solution they had sent). I was negative for everything (HIV, Hep, Syphilis, Gonorrhea, Chlamydia from the urine test, etc.), but tested positive for throat chlamydia! I'm very surprised by that. I've given oral sex to women, but I read that cunnilingus was a very low risk activity for chlamydia. Also, I would assume that the antibiotics that killed of the chlamydia bacteria in the penis area would also have killed off anything in the throat! The test technique they used is apparently called TaqManPCR.
Most ENTs here don't know much about sexual diseases in the throat, so I'd need to go to a sexual disease clinic to double check this throat, which is not covered by insurance (the most popular one is roughly 80 USD for the throat chlamydia test if they were to insist on double checking, and 150 USD for issuing Azithromycin). What is the probability that this was a false positive?
Thank you!