From your query, it appears that all you care about is to know whether HIV
DNA testing is accurate or not...& that too on a public information portal where you proudly testify to testing the recepient partner without his knowledge (wonder how that works). Assuming that he was 'under the influence' or 'otherwise incapacitated', this does not appear to be a consensual act. I am not one for passing judgements' as adoctor..so yes clinically speaking, the DNA testing is about as accurate as you can get assuming it was the PCR used. However, do remember these are tests prone to errors..human & otherwise. The itch on your back appears unrelated. While i am all for gender equality & am not biased as to any individual's sexual leanings, i think i would not be fulfilling my hippocratic oath if i were not to bring to your attention that (as you had consensual sex with the person alluded to: if not, presume it constitutes rape) i feel it is your moral obligation to please 'inform' the other party of their HIV status now that you are aware of it & do society a big favour to limit the spread of the deadly virus. It does not matter if it is India or the UK..i appeal to your inner voice to please go ahead & do the right thing. Do practice safe responsible sex in the future.
Dr Praveen Rodrigues MD
Vikram Hospital, Bangalore, India