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Table 2 Distribution of tuberculosis infected carcasses and test properties of routine abattoir inspection in different abattoirs in Ethiopia

From: Diagnostic efficiency of abattoir meat inspection service in Ethiopia to detect carcasses infected with Mycobacterium bovis: Implications for public health

  Test comparison Test properties of routine abattoir inspection
  Routine abattoir inspection Detailed inspection Kappa
[95% CI]
Sn (%)
[95% CI]
Sp (%)
[95% CI]
PV+ (%)
[95% CI]
PV-(%)
[95% CI]
   +ve -ve      
Addis Ababa +ve 54 - 0.7
[0.7-0.72]
60.0
[50.0-60.0]
100.0
[99.0-100.0]
100.0
[93.0-100.0]
93.0
[92.0-93.0]
  -ve 37 509      
  Total 91 509      
  % 15.2       
Adama +ve 4 - 0.05
[0.02-0.05]
3.0
[2.0-3.0]
100.0
[99.0-100.0]
100.0
[51.0-100.0]
76.0
[75.0-76.0]
  -ve 125 393      
  Total 129 393      
  % 24.7       
Melge-Wondo +ve 36 9 0.67
[0.57-0.75]
60.0
[51.0-66.0]
99.0
[90.0-99.0]
80.0
[68.0-88.0]
98.0
[97.0-98.0]
  -ve 24 1256      
  Total 60 1265      
  % 4.5       
Hawassa +ve - - 0.0
[0.0-0.0]
0.0
[0.0-0.0]
100.0
[100.0-100.0]
0.0
[0.0-0.0]
91.0
[91.0-91.0]
  -ve 39 403      
  Total 39 403      
  % 8.8       
Yabello +ve 1 13 0.03
[-0.03-0.22]
6.0
[1.0-22.0]
97.0
[96.0-97.0]
7.0
[1.0-29.0]
96.0
[96.097.0]
  -ve 17 402      
  Total 18 415      
  % 4.2       
  1. % = apparent prevalence based on detailed abattoir inspection results