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Table 1 Summary of diagnostic test results and proposed mechanisms of false positivity

From: Spectrum of false positivity for the fourth generation human immunodeficiency virus diagnostic tests

  Abbott p24 antigen/antibody MultiSpot HIV-1/HIV-2 differentiation HIV proviral DNA HIV RNA viral load Alternative diagnosis/mechanism of false positivity Other explanatory studies/reports
Case 1 Positive Non-reactive Not done Negative EBV infection and reactive lymphocytosis [713]
Case 2 patient Positive Reactive to HIV-1 Negative Negative Metastatic cancer [18]
Case 2 exposed health care provider Positive Reactive to HIV-1 Negative Negative Healthy/query poor specificity of individual test kit [16]
Case 2 exposed health care provider (6 month follow up) Negative   Negative Negative