False‐positive human immunodeficiency virus type 1 western blot tests in noninfected blood donors

Abstract excerpt

BACKGROUND: The manufacturers' criteria for a positive human immunodeficiency virus type 1 (HIV-1) Western blot (WB) test were recently revised to require reactivity to only two of the following bands: p24, gp41, and gp120/160. In a recent report, low-risk blood donors were identified in whom nonspecific reactivity to multiple env antigens in WB testing resulted in apparently false-positive WBs by these criteria....

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