Table 3.
CLIA S/Co Values and ELISA Titers of Donated Convalescent Plasma
| CLIA S/Co Values | N (%) | ELISA IgG Titer Equivalent |
|---|---|---|
| 0.02 to 1 | 21 (11.7) | Neg to 1:512 |
| >1 to 5 | 70 (39.1) | Neg to 1:4096 |
| >5 to 10 | 32 (17.9) | Neg to 1:4096 |
| >10 to 20 | 27 (15.1) | 1:128 to 1:4096 |
| >20 | 29 (16.2) | 1:2048 to 1:32,768 |
| ELISA IgG Titer | N (%) | CLIA S/Co Value Equivalent |
| Neg | 15 (8.4) | 0.02 to 6.25 |
| 1:32 | 2 (1.1) | 0.37 to 0.5 |
| 1:64 | 7 (3.9) | 0.09 to 9.71 |
| 1:128 | 10 (5.6) | 0.25 to 11.51 |
| 1:256 | 19 (10.6) | 0.05 to 7.66 |
| 1:512 | 31 (17.3) | 0.81 to 19.65 |
| 1:1024 | 35 (19.6) | 1.2 to 15.52 |
| 1:2048 | 22 (12.3) | 2.32 to 26.62 |
| 1:4096 | 22 (12.3) | 1.92 to 44.12 |
| 1:8192 | 5 (2.8) | 23.48 to 34.26 |
| 1:16,384 | 8 (4.5) | 28.08 to 63.4 |
| 1:32,768 | 3 (1.9) | 28.82 to 52.64 |
Abbreviations: CLIA, chemiluminescent immunoassay, S/Co, sample to control intensity ratio, ELISA, enzyme-linked immunosorbent assay, Neg, negative, “0.