Hospital where blood taken | X | Y | Y | St Mary's |
| Blood was stored and retrospectively tested | Index antenatal test (serum not available for repeat retrospective testing) | Blood was stored and retrospectively tested | Postnatal test. Blood stored |
HIV antibody screening tests | Clear negative | Clear negative | Weak positive | Strong positive |
| i Detect-HIVα | i Abbot Axsym HIV 1/2 gOγ | i Murex HIV 1+2δ | i Abbot Axsym HIV 1/2 gOγ |
| OD=−0.030, CO=0.144 | S/CO=0.42 | OD=0.938, CO=0.252 | OD=14.86, CO=1.00 |
| ii Wellcozyme HIV | | ii Wellcozyme HIV | ii Detect-HIVα |
| Recombinantβ | | Recombinantβ | |
| OD=1.179, CO=0.696 | | OD=0.486, CO=0.839 | OD=2.050, CO=0.152 |
| | | iii Serodia HIV-1/2ε | iii Wellcozyme HIV Recombinantβ |
| | | HIV 1:1/256, HIV 2: <1/32 | OD=0.062, CO=0.532 |
HIV specific antibody tests (CPHL in-house EIAs) | Clear negatives, (OD/CO) HIV | — | Strong positives, (OD/CO) HIV | Strong positives for IgG and IgA; weak positive IgM (OD/CO) HIV IgG=15.41, IgM=3.14, IgA=4.18. *Note decreasing values for IgM and IgA compared to previous |
| IgG=0.49, IgM=0.36, IgA=0.44 | | IgG=12.34, IgM=10.94, IgA=5.28 | |
HIV western blotζ | — | — | — | HIV1 gag p17+, p24+++, p55+; pol p31++, p51++, p66+++; env gp41−, gp120+, gp160+++ |
| | | | HIV2 gp36− |
HIV RNA (copies/ml) | Not detected | — | — | 41377 Quantiplex HIV-1 RNA 3.0θ |
| (< Limit of detection) Cobas Amplicor HIV-1 Monitor v1.5η | | | 82400 Cobas Amplicor HIV-1 Monitor v1.5η |