Flocks | Sheep clinical status (foot lesions) | No. sheep tested | aprV2 PCR Run/Cut-off | Culture Gelatinase Thermostable (Virulent) vs aprV2 PCR | Percentage positive results | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Concordant results | Culture +ve | PCR + ve | p value | Kappa | Culture | aprV2 PCR | |||||
+ve | -ve | PCR -ve | Culture -ve | ||||||||
12 to 24 | +ve | 135 | Run 1 / 40 | 31 | 17 | 0 | 87 | < 0.0001 | 0.082 | 23.0% | 87.4% |
12 to 24 | +ve | 135 | Run 1 / 35 | 31 | 20 | 0 | 84 | < 0.0001 | 0.1 | 23.0% | 85.2% |
12 to 14 | -ve | 35 | Run 1 / 40 | 3 | 16 | 0 | 16 | 0.0002 | 0.146 | 8.6% | 54.3% |
12 to 14 | -ve | 35 | Run 2 / 40 | 3 | 12 | 0 | 20 | < 0.0001 | 0.093 | 8.6% | 65.7% |
12 to 14 | -ve | 35 | Run 1 / 35 | 3 | 20 | 0 | 12 | 0.0015 | 0.222 | 8.6% | 42.9% |
12 to 14 | -ve | 35 | Run 2 / 35 | 3 | 19 | 0 | 13 | 0.0009 | 0.2 | 8.6% | 45.7% |
12 to 14 | -ve & + ve | 72 | Run 1 / 40 | 9 | 20 | 0 | 43 | < 0.0001 | 0.104 | 12.50% | 72.20% |
12 to 14 | -ve & + ve | 72 | Run 2 / 40 | 9 | 16 | 0 | 47 | < 0.0001 | 0.078 | 12.50% | 77.80% |
12 to 14 | -ve & + ve | 72 | Run 1 / 35 | 9 | 27 | 0 | 36 | < 0.0001 | 0.158 | 12.50% | 62.50% |
12 to 14 | -ve & + ve | 72 | Run 2 / 35 | 9 | 27 | 0 | 36 | < 0.0001 | 0.158 | 12.50% | 62.50% |
12 to 24 | -ve & + ve | 170 | Run 1 / 40 | 34 | 33 | 0 | 103 | < 0.0001 | 0.114 | 20.0% | 80.6% |
12 to 24 | -ve & + ve | 170 | Run 1 / 35 | 34 | 40 | 0 | 96 | < 0.0001 | 0.143 | 20.0% | 76.5% |