ELISA #1 | ELISA #2 | ELISA #3 | ELISA #4 | ELISA #5 | ELISA #6 | |
---|---|---|---|---|---|---|
Type | Competitive | Indirect | Competitive | Competitive | Indirect | Indirect |
Antigen | Recombinant p26 | Recombinant gag and env antigens | Purified p26 | Recombinant p26 | Recombinant antigen- not specified | Recombinant p26 |
Run time (‘) | 160 | 135 | 45 | 90 | 20 | 35 |
Interpretation Criterion/Formula | \( \mathrm{PI}=100-\left({\overline{\mathrm{OD}}}_{\mathrm{S}}/\overline{{\mathrm{OD}}_{\mathrm{K}-}}\ast 100\right) \) | \( \mathrm{S}/\mathrm{P}={\frac{\left(\overline{{\mathrm{OD}}_{\mathrm{S}}}-\overline{{\mathrm{OD}}_{\mathrm{K}-}}\right)}{\left(\overline{{\mathrm{OD}}_{\mathrm{K}+}}-\overline{{\mathrm{OD}}_{\mathrm{K}-}}\right)}}^{\ast}\;100 \) | Compared to ODK+ | \( \mathrm{S}/\mathrm{P}={\frac{\left(\overline{{\mathrm{OD}}_{\mathrm{S}}}-\overline{{\mathrm{OD}}_{\mathrm{K}-}}\right)}{\left(\overline{{\mathrm{OD}}_{\mathrm{K}+}}-\overline{{\mathrm{OD}}_{\mathrm{K}-}}\right)}}^{\ast}\;100 \) | Compared to ODK+ | Compared to ODK+ |
PI <30: Neg | S/P ≤ 40: Neg | ODS > ODK+: Neg | S/P ≤ 50: Neg | ODS < ODK+: Neg | ODS < ODK+: Neg | |
Outcome definition | 30 ≤ PI ≤ 50: Equivocal | 40 < S/P < 50: Equivocal | ODS≤ ODK+: Pos | 50 < S/P < 60: Equivocal | ODS ≥ ODK+: Pos | ODS ≥ ODK+: Pos |
PI >50: Pos | S/P ≥ 50: Pos | S/P ≥ 60: Pos |