Table 1.
Sensitivity and specificity of OPS- and CPS-latex agglutination tests and IHA
| Test | Cutoff | % Sensitivity (95% CI) | % Specificity (95% CI) | |
|---|---|---|---|---|
| Melioidosis | Thai donors | U.S. donors | ||
| N = 141 | N = 188 | N = 90 | ||
| OPS-latex | Agglutination | 84.4 (77.3–90.0) | 56.9 (49.5–64.1) | 97.8 (92.2–99.7) |
| CPS-latex | Agglutination | 69.5 (61.2–77.0) | 63.8 (56.5–70.7) | 97.8 (92.2–99.7) |
| IHA | Titer ≥ 1:160 | 69.5 (61.2–77.0) | 67.6 (60.4–74.2) | 100 (96.0–100) |
CI = confidence interval; CPS = capsular polysaccharide; IHA = indirect hemagglutination assay; OPS = O-polysaccharide.