Skip to main content

Table 4 Temporal surveillance sensitivity with related confidence in low herd prevalence and in freedom from disease

From: Evaluation of temporal surveillance system sensitivity and freedom from bovine viral diarrhea in Danish dairy herds using scenario tree modelling

PH = 0.2 % 1 PI introduced   1 TI introduced  
ELISA_HRP TemSSe PLow TemSSe PLow
 blocking_90 64.5 (7.9; 97.3) 72.5 (50.4; 97.2) 64.4 (7.8; 97.3) 72.5 (50.4; 97.2)
 SVANOVIR_90 99.0 (86.9; 99.9) 98.9 (87.7; 99.9) 64.0 (8.0; 97.0) 72.1 (50.4; 96.9)
 blocking_365 98.2 (79.2; 99.8) 97.6 (78.5; 99.8) 65.6 (8.5; 97.4) 68.9 (44.9; 96.7)
 SVANOVIR_365 99.8 (99.3; 99.9) 99.7 (99.1; 99.9) 78.9 (30.5; 98.3) 78.3 (52.0; 97.8)
PH = 0.02 % 1 PI introduced   1 TI introduced  
ELISA_HRP TemSSe PFree TemSSe PFree
 blocking_90 12.1 (1.0; 36.2) 51.6 (48.2; 59.5) 12.1 (1.0; 36.2) 51.6 (48.2; 59.5)
 SVANOVIR_90 43.7 (22.6; 56.9) 62.4 (54.6; 68.6) 12.0 (1.0; 35.5) 51.5 (48.2; 59.2)
 blocking_365 39.3 (17.8; 55.4) 55.7 (46.3; 64.5) 12.5 (1.1; 36.6) 47.3 (40.0; 55.8)
 SVANOVIR_365 53.5 (46.7; 59.2) 62.3 (55.5; 67.3) 17.7 (4.4; 40.0) 48.6 (41.0; 57.2)
  1. TemSSe Median temporal surveillance system sensitivity, PLow Confidence in low herd prevalence, PFree Confidence in complete freedom from BVD. Estimates are reported as median % (90 % prediction intervals), according to ELISA used (blocking = Danish blocking ELISA, SVANOVIR = SVANOVIR ELISA), and HRP (high risk period of 90 or 365 days) after the introduction of 1 persistently infected (PI) calf or 1 transiently infected (TI) milking cow into 1 (between-herds design prevalence PH = 0.02 %) or 8 (PH = 0.2 %) Danish dairy herd(s)