HIV and AIDS
Ask HIV and AIDS Experts. Get Answers to Your HIV and AIDS Questions
This is Dr. David
receptive anal sex from an HIV positive partner would have a 50 in 10,000 chance to give you HIV
or about 5 in 1000 chance.
your chances of HIV are very small.
you can get DNA or RNA PCR testing 10-20 days after the event, but I bet you will be HIV negative.
you can also talk to an HIV counselor about PEP antiviral therapy, but you are right, your chances of contracting HIV are very very low.
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5402a1.htm#tab1let me know if you have questions