ELISA & W.B.
Feb 26, 2005
Hi Dr. Francisno: In October 2002, I had safe sex with a married woman. In April 2003 (6 months later), I had a REACTIVE ELISA. Then a week later I had both an ELISA and a Western Blot. They're NON-REACTIVE and NEGATIVE, respectively. Do both these 2 test overuled the 1st. ELISA REACTIVE? Why this false positive?
Response from Dr. Frascino
Hello Daydreamer 630410,
Yes, all evidence would indicate your April 2003 test was indeed a false positive. First off, your exposure was "safe sex." Next, your reactive ELISA was followed one week later by a nonreactive ELISA and negative Western Blot. Taken together, this means you are HIV negative. There are a variety of reasons for a false-positive ELISA test, including technical or clerical error. I've discussed this and other reasons at length in many previous posts, so I'll refer you to the archives rather than reiterating this information once again.
Congratulations on your negative status!
Stay safe and you'll stay well.
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