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Table 4 Specificity of different products

From: A comparative evaluation of the performance of commercially available rapid immunochromatographic tests for the diagnosis of visceral leishmaniasis in Bangladesh

Product Fresh Stored   
Blood Serum Blood Serum
Specificity (Healthy Control)
Kalazar Detect™ 100 (96.34–100) 100 (96.34–100) 100 (96.34–100) 97.14 (85.03–95.02)
Signal®KA 100 (89.52–100) 100 (89.90–100) 100 (96.34–100) 100 (89.90–100)
Crystal®KA 100 (96.34–100) 100 (96.34–100) 100 (96.34–100) 100 (89.90–100)
Onsite leishmania Ab (Rev A) 97.14 (85.03–99.52) 94.29 (80.86–99.13) - 100 (89.90–100)
Onsite leishmania Ab (Rev B) 48.57 (31.39–66) 45.71 (28.84–63.45) - 20 (8.48–36.95)
  Specificity (Disease Control)
Kalazar Detect™ 93.33 (77.89–98.99) 93.33 (77.89–98.99) 96.67 (82.72–99.44) 96.55 (82.17–99.42)
Signal®KA 93.33 (77.89–98.99) 93.33 (77.89–98.99) 96.15 (80.30–99.36) 96.55 (82.17–99.42)
Crystal®KA 96.67 (82.72–99.44) 96.67 (82.72–99.44) 96.67 (82.72–99.44) 96.55 (82.17–99.42)
Onsite leishmania Ab (Rev A) 93.33 (77.89–98.99) 93.33 (77.89–98.99) - 89.66 (72.62–97.69)
Onsite leishmania Ab (Rev B) 70 (50.60–85.24) 66.67 (47.19–82.69) - 44.83 (26.46–64.30)
  Specificity (Healthy and Disease Controls combined)
Kalazar Detect™ 96.92 (89.30–99.54) 96.92 (89.30–99.54) 98.46 (91.69–99.74) 96.88 (89.14–99.53)
Signal®KA 96.88 (89.14–99.53) 96.92 (89.30–99.54) 98.36 (91.17–99.73) 98.44 (91.57–99.74)
Crystal®KA 98.46 (91.69–99.74) 98.46 (91.69–99.74) 98.46 (91.69–99.74) 98.44 (91.57–99.74)
Onsite leishmania Ab (Rev A) 95.38 (87.08–98.98) 93.85 (84.97–98.26) - 95.31 (86.89–98.97)
Onsite leishmania Ab (Rev B) 58.46 (45.57–70.56) 55.38 (42.53–67.73) - 31.25 (24.30–57.26)