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Table 2 Probability input parameters

From: Risk assessment as a tool for improving external biosecurity at farm level

  BRSV BCoV SD M. hyo
Contact % % % %
Animal transport vehiclesa 0-30-80 (Beta Pert) 1-40-95 (Beta Pert) 0-3-40 (Beta Pert) 0-40 (uniform)
Deadstock collectorsa 0-3-80 (Beta Pert) 0-5-95 (Beta Pert) 0-0.1 (uniform) 0-0.1 (uniform)
Visitor (vet, AI technician)a 0-40-80 (Beta Pert) 1-50-95 (Beta Pert) 0-0.1-5 (Beta Pert) 0-0.01-1 (Beta Pert)
Hoof trimmera 0-40-80 (Beta Pert) 1-80-95 (Beta Pert) NAc NA
Biosecurity measure
3–4 weeks’ quarantineb 0-50-99 (Beta Pert) 0-20-99 (Beta Pert) 20-50-50.1 (Beta Pert) 70-89-90 (Beta Pert)
Biosecurity lock for loading, ventilation off while truck outside 50-90 (uniform) 50-90 (uniform) 100 80-90-99 (Beta Pert)
Isolated area for carcasses 99-99.5 (uniform) 99-99.5 (uniform) 100 100
Protective clothing provided for visitors 50-80 (uniform) 50-75 (uniform) 90-99-100 (Beta Pert) 95-100 (uniform)
Farm provides hoof trimming crush 50-80 (uniform) 50-80 (uniform) NA NA
  1. Introduction of bovine respiratory syncytial virus (BRSV) and bovine coronavirus (BCoV) in cattle herds, swine dysentery (SD) and Mycoplasma hyopneumoniae (M. hyo) in pig herds, via different contacts that come directly from an infected farm). Level of risk reduction by different biosecurity measures. Percentage figures represent minimum-most likely-maximum values or minimum-maximum values. Probability distributions shown in brackets
  2. a assuming contact with diseased animals, thus multiplied by herd prevalence in the models
  3. b 3 weeks in pig herds, 4 weeks in cattle herds
  4. c NA = not applicable