Table 3.
Test | Day after the disease onset | No. positive samples/No. of samples tested | % Sensitivity | 95% CI |
---|---|---|---|---|
Positive Culture | Day 1–3 | 14/37 | 37.8% | 22.9–55.2% |
Day 4–6 | 4/18 | 22.2% | 7.4–48.1% | |
Day 7 | 2/3 | 66.7% | 12.5–98.2% | |
Unknownb | 1/16 | 6.3% | 3.3–32.3% | |
Total (Culture) | 21/74 | 28.4% | 18.8–40.2% | |
MAT titer ≥1:400 | Day 1–3 | 4/37 | 10.8% | 3.5–26.4% |
Day 4–6 | 2/18 | 11.1% | 2.0–36.1% | |
Day 7 | 2/3 | 66.7% | 12.5–98.2% | |
Unknownb | 2/16 | 12.5% | 2.2–39.6% | |
Total (MAT) | 10/74 | 13.5% | 7.0–24.0% | |
LEPkit Positive T-line | Day 1–3 | 36/37 | 97.3% | 84.2–99.9% |
Day 4–6 | 18/18 | 100% | 78.1–100% | |
Day 7 | 3/3 | 100% | 31.0–100% | |
Unknownb | 16/16 | 100% | 75.9–100% | |
Total (LEPkit) | 73/74 | 98.7% | 91.7–100% |
aCriteria for diagnosis of acute leptospirosis at admission-phase by gold standard test included: 1) positive leptospiral isolation by culture; or 2) MAT titer ≥1:400 at admission-phase. bThe disease onset was unclear or was not recorded. 95% CI = 95% confidence interval determined by McNemar’s test.