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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: J Acquir Immune Defic Syndr. 2015 Aug 1;69(4):430–438. doi: 10.1097/QAI.0000000000000610

Figure 1. Testing algorithm used to classify samples with discordant HIV rapid tests as HIV positive or HIV negative.

Figure 1

Assays used for testing were: Fourth-generation assays: the GS HIV Combo Ag/Ab EIA (BioRad Combo), the ARCHITECT HIV Ag/Ab Combo assay (Abbott Combo); Discriminatory assay: Multispot HIV-1/HIV-2 Rapid Test (Multispot); HIV RNA assays: the APTIMA HIV-1 RNA Qualitative Assay (Aptima HIV RNA) and the Roche COBAS AMPLICOR HIV-1 MONITOR test, v1.5 (Roche viral load).

a Three (11.1%) of the 27 samples that had reactive results with the discriminatory assay were positive with one or both of the HIV RNA assays (Aptima HIV RNA, Roche viral load). The remaining 24 samples had undetectable HIV RNA.