Quantitative B19V PCR and antibody results on confirmed positive donations
| B19V DNA concentration, IU/mL, in donation . | No. of B19V DNA–positive donations . | No. (%) B19V IgM and IgG positive . | No. (%) B19V IgM negative, IgG positive . | No. (%) B19V IgM negative and IgG negative . |
|---|---|---|---|---|
| Less than 20 | 56 | 2 (4%) | 52 (93%) | 2 (4%) |
| 20 to less than 100 | 19* | 5 (28%) | 13 (72%) | 0 |
| 102 to less than 103 | 23 | 18 (78%)† | 2 (9%) | 1 (4%) |
| 103 to less than 104 | 4 | 4 (100%) | 0 | 0 |
| 104 to less than 105 | 0 | 0 | 0 | 0 |
| 105 to less than 106 | 1 | 0 | 0 | 1 (100%) |
| Subtotal | 103* | 29 (28%) | 67 (66%) | 4 (4%) |
| More than 106 | 2 | 0 | 0 | 2 |
| Total | 105‡ | 29 | 67 | 6 |
| B19V DNA concentration, IU/mL, in donation . | No. of B19V DNA–positive donations . | No. (%) B19V IgM and IgG positive . | No. (%) B19V IgM negative, IgG positive . | No. (%) B19V IgM negative and IgG negative . |
|---|---|---|---|---|
| Less than 20 | 56 | 2 (4%) | 52 (93%) | 2 (4%) |
| 20 to less than 100 | 19* | 5 (28%) | 13 (72%) | 0 |
| 102 to less than 103 | 23 | 18 (78%)† | 2 (9%) | 1 (4%) |
| 103 to less than 104 | 4 | 4 (100%) | 0 | 0 |
| 104 to less than 105 | 0 | 0 | 0 | 0 |
| 105 to less than 106 | 1 | 0 | 0 | 1 (100%) |
| Subtotal | 103* | 29 (28%) | 67 (66%) | 4 (4%) |
| More than 106 | 2 | 0 | 0 | 2 |
| Total | 105‡ | 29 | 67 | 6 |
The prevalence of B19V DNA–positive donations in 12 529 tested donations was 0.84%.
One donor was not tested for B19V antibody; percentages have been calculated eliminating that donor from both the numerator and the denominator.
Two donors were IgM equivocal and IgG positive.
The 105 B19V DNA–positive donations came from 103 donors, 2 of whom gave positive donations on 2 occasions.