dear doctor
first, many thanks for your detailed answers to the many topics relating to my query, which i have found very helpful. being extremely paranoid, i however have an additional few detailed questions that i am hoping you could answer:
my story is much like most others - i am normally in a monogamous, heterosexual relationship but for some reason, 10 days ago, received unprotected oral sex from a male prostitute at a gay massage parlour. it lasted about 15 minutes.
i went to my doctor one week after the incident and was tested for gonnorhea, syphilis and clahmydia - all negative. i have also had no symptoms of any std. my doctor advised that, while the risk was low, i should be tested for hiv after 10-12 weeks. he examined my penis and found no lesions or sores of any kind.
in the meantime, i am obviously concerned about passing the virus on to my regular partner, who would immediately be suspicious if i suddenly insisted on usiong a condom.
i understand that my risk of infection is low (though have received conflicting information as to exactly how low and would appreciate some reassurance in this regard) but still have the following questions:
1) are there variations in oral transmission risk depending on the strand of hiv virus in question? i live in south africa and am not sure whether the hiv strands here transmit similarly to those elsewhere.
2) does the likelihood of getting hiv through receiving fellatio increase if the exposure lasts longer than a few minutes?
3) given my concern about passing the virus on to my partner in the event that i am infected, should i insist on an immediate viral load test rather than to wait for 6-10 weeks and have an antibody test?
apologies if my queries overlap with others already answered - i have tried to find answers to my specific questions in other threads but have somehow been unsuccessful.
regards and many thanks