How long does it take for AIDS to show up on a blood test?

Three to six months from your last unsafe sexual experience is the amount of time you need to wait to get an HIV test. Depending on the source, you will get differing opinions about this "window" of time between infection and HIV antibody detection in a blood test. For example, the Centers for Disease Control and Prevention (CDC) recommends six months, some city and state health departments advise waiting two months, while the Gay Men's Health Crisis (GMHC), the oldest and largest HIV and AIDS service organization in the world, suggests a three-month waiting period. Alice thinks that six months is a long time to wait for HIV test results, and a negative or positive test result three months after possible HIV exposure can be considered reliable, although not 100 percent accurate.

Correction there is a new test out that is more sentive thent he stqandard HIV test. I doesn't take 3 months ask your doc about HIV DNA By PCR

HIV DNA by PCR.

This is a lot more sentive test then the standard HIV test used. Don't hold me too it but some evendance is out there that it can detect it as earily as 28 days. Also ask for HIV DNA by PCR for HIV-1 and HIV-2. Your going to dish out some cash for it. But it will help give you some peice of mind. The test cost range from $600 to $900.

Here are some details about it.