Table 2.
Comparison of measles IgM RDT result interpretations based on relative reflectance measured using the ESEQuant Lateral Flow Reader with the Siemens Enzygnost Anti-Measles Virus/IgM EIA
| Measles IgM RDT result interpretation based on ESEQuant LF Reader measurements | Total | |||
|---|---|---|---|---|
| Positive (Test Line ≥ 60 mV) | Negative (Test Line < 60 mV) | |||
| Measles IgM EIA results | Positive | 73 | 5 | 78 |
| Equivocal | 1 | 0 | 1 | |
| Negative | 1 | 45 | 46 | |
| Total | 75 | 50 | 125 | |
A measles IgM RDT was interpreted as valid when the ESEQuant LF Reader reflectance peak height measurement at the Control Line was ≥60 mV. A relative reflectance peak height measurement of ≥60 mV at the Test Line was interpreted as positive for valid measles IgM RDTs. EIA, enzyme immunoassay; ESEQuant LF Reader, ESEQuant Lateral Flow Reader; mV, millivolts; RDT, rapid diagnostic test.