Table 1.
Qualitative agreement between the diphtheria toxoid MIA plus PVX and the ToBI and Vero cell NTa
| Result | % diagnostic agreement | No. of samples with indicated MIA result |
||
|---|---|---|---|---|
| Positive | Equivocal | Negative | ||
| ToBI | 89 | |||
| Positive | 47 | 7 | 0 | |
| Equivocal | 1 | 52 | 7 | |
| Negative | 0 | 1 | 26 | |
| NT | 76 | |||
| Positive | 49 | 22 | 0 | |
| Equivocal | 0 | 34 | 9 | |
| Negative | 0 | 3 | 24 | |
a
Diphtheria antitoxin levels in individual serum samples were classified as positive, i.e., having the full protective level of circulating antitoxin (≥0.1 IU/ml); equivocal, having partial protective levels of antitoxin (0.01 to 0.09 IU/ml); or negative, providing no protection (<0.01 IU/ml) (4).