Hi Dr 6 months ago i received oral sex from a person i dont know at all.I got tested for hiv at 2,3 and 6 months all negative.For all the other stds at 6 months (all negative).But i suffer from depression and i need to stop taking these pills. Firstly i would like to know if you recommend me further testing. Secondly i need to tell me if the eliza tests can detect all types and subtypes of hiv.i got tested for hiv1 and 2,but i have heard about some subtypes such as O,N that they need more specific eliza tests. Thirdly,do you recommend me other types of tests?such as nat or pcr? Please doctor help me.I am in a serious relationship and I am so worried if i expose something to her. I really need your advice cause i need to know whether i am healthy or not and stop taking these stupid antidepressants. thank u in advance.

Testing for antibody to HIV by ELISA is the best way to determine if infection has occured. Since you tested up to 6 months after the potential exposure and remain negative, there would be no need for further testing unless you had other unprotected sexual contact more recently. In that case the clock starts all over again. Receiving oral sex is also a fairly low risk activity. Receptive anal or vaginal intercourse would be the most risky, followed by insertive anal or vaginal intercourse, and much less..oral sexual contact. HIV Group O and N are extremely rare in the United States. Most testing kits are getting better picking up Group O (can be up to 20% false negatives). Your risk of acquiring Group O or N virus would be very low unless you traveled abroad or had sexual contact with individuals from Africa (particularly Cameroon and Gabon). I would not recommend any further testing. PCR is not recommended for diagnosis and may be falsely reactive in a low-risk person.

I hope you are re-assured about your negative status. You should continue to use condoms and latex barriers for protection.