A member asked:

Can an hiv antibody screening test be positive but the western blot negative?

A doctor has provided 1 answer
Dr. Joel Gallant answered

Specializes in Infectious Disease

Yes: There are 2 reasons for this kind of result: (1) a false positive, or (2) early infection before seroconversion. In someone at low risk for HIV without symptoms, another negative WB in 1 month means there's no infection. In someone at risk or with symptoms of acute infection, a viral load can be helpful. The new 4th generation antigen/antibody tests will eliminate this problem.

Answered 6/10/2014

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