Uncertain about hiv testing process

[Gravity1134]

Can anyone explain when they test for hiv 1/2 they automatically only use a hiv type1 western blot?  Is it because this test will detect both viruses? And if it comes back indeterminate is that when they test for hiv 2? If the western blot is negative they usually stop, but how do you rule out hiv 2

[Gravity1134]

Now I'm talking about an western blot for hiv type 1. If its negative does it mean negative for both hiv 1 and 2? Thanks

[Gravity1134]

Does anybody know what bands usually show up for hiv type2  on a hiv type 1 western blot that would suggest infection with hiv 2? I'm just trying to educate myself.

[tonster246]

yes thats right..it means your elisa was a false positive...a negative western blot trumps everything else!

[Gravity1134]

Thanks again Teak, I know it's used to confirm the initial screen . I want to know if the western blot is negative does it mean you are clear from hiv 1 and 2?

[Teak]

Western blot test are used to confirm a positive test.

[Gravity1134]

I meant to ask that after the initial hiv 1/2 screen they usually use a western blot hiv 1 to confirm the elisa. Will the western blot hiv type1 rule out hiv 1/2?