TABLE 1.
Comparison of results of rapid immunochromatographic assay with those of capture ELISA for IgM and IgG antibodiesa
| Rapid immuno- chromatographic test result | No. of samples tested/no. (%) positive
|
|
|---|---|---|
| IgM ELISA | IgG ELISA | |
| Reactive | 5/6 (83)b | 8/8 (100) |
| Weakly reactive | 7/10 (70)c | 9/19 (46) |
| Negative | 0/27 (0) | 0/16 (0) |
| Total | 12d | 17e |
a
n = 43.
b
One sample which was negative on ELISA for IgM was positive for IgG by both tests.
c
In these seven cases, secondary dengue was reported (positive for IgG by both tests; for IgM, the result was positive by ELISA and weakly reactive by the rapid assay).
d
Of 12 IgM capture ELISA-positive patients, 4 had primary dengue infection.
e
Of 17 patients, 7 had confirmed secondary dengue (IgM+, IgG+) and 10 were suspected of having secondary dengue (IgG+, IgM−).