So there are no tests other than elisa and western blot that would detect hiv if a person is sure of an encounter with an hiv+ person?

Repeat testing: It may take up to 6mos after an exposure to HIV for the ELISA & western blots to turn positive. If you were exposed to HIV & had negative tests, it is recommended that you get retested in 6 months. If positive, your doctor will perform more detailed studies, like viral load & CD4 counts. Not all exposures result in HIV infection, however you should use precautions to protect yourself & others.

Others, but why??: The conventional method in the US is to perform an HIV screen followed by an HIV western blot. Both test for antibodies against HIV. Other methods such as p24 antigenemia assay and by rt-PCR are very expensive and are not typically used for diagnosis. However, your question likely has very specific issues best addressed by your physician and not in this venue.

Yes-but why?: Note-a single encounter via unprotected sex with an HIV + person doesn't mean you are infected. It depends on several factors (discussed elsewhere). The HIV screen by elisa , confirmed by western blot is 97-99% sensitive/ specific. Though there is a window period where neither test works, it is recommended that one is tested every 3 mo if sexually active, especially with known risk of exposure.