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Table 3 Bayesian estimates of sensitivity and specificity for each test, and disease prevalence (%)

From: Determination of the sensitivity and specificity of bovine tuberculosis screening tests in dairy herds in Thailand using a Bayesian approach

Parameter

Test

Median

95% PPIa

Sensitivity

SIT (standard)b

62.4

43.2–80.2

 

IFN-γ c

60.1

39.8–81.3

 

ELISAd

52.5

30.8–77.7

Specificity

SIT (standard)b

90.6

82.9–97.6

 

IFN-γ c

89.0

81.6–95.4

 

ELISAd

88.3

81.8–93.3

Disease prevalence

 

14.1

6.7–23.4

Covariance of infected cattle

 

−9.9

−22.3-2.9

Covariance of uninfected cattle

 

2.6

−0.3-6.7

  1. a 95% PPI = 95% posterior probability interval
  2. b single intradermal tuberculin test using standard interpretation
  3. c interferon gamma assay
  4. d a commercial antibody detection test (M. bovis Ab ELISA)