Table 1.
Production characteristics for a healthy steer used the model parametrization.
Table 2.
Production costs for model parametrization.
Antimicrobial costs are applicable only in prevention and control.
Table 3.
Cumulative incidence estimates of diseases for model parametrization.
Table 4.
Average day of onset, day of death and day of anticipated slaughter, for each infectious disease.
Table 5.
Default disease impacts for model parametrization.
Fig 1.
Net impact, per steer present in the feedlot at day 0, for the No-PC and No-PCT scenarios, compared with the PCT scenario, as a function of the level of disease incidence.
The grey dots represent the median value, written on the right side, the red diamonds represent the mean, and the bars represent the 25th and 75th percentiles values. PCT: Prevention Control and Treatment; No-PC: no Prevention, no Control; No-PCT: no Prevention, no Control and no Treatment.
Fig 2.
Tornado diagram for factors influencing the net impact (median value) in moderate incidence.
Fig 2A: No-PC scenario compared to PCT scenario; Fig 2B: No-PCT scenario compared to PCT scenario. Solid (positive) or dashed (negative) bars indicates the sign of coefficient For example, a positive coefficient e.g., Feed costs with solid bar extending to the right, indicates that this input has a positive impact: increasing this input will increase the net impact. The values (in bold) are median values from Fig 1. PCT: Prevention Control and Treatment; No-PC: no Prevention, no Control; No-PCT: no Prevention, no Control and no Treatment; BRD / RR MORB: relative risk of Bovine Respiratory Disease morbidity when antimicrobials are not used for prevention. LA / RR MORB: relative risk of liver abscesses morbidity when antimicrobials are not used for prevention; BRD / RR FAT: relative risk of Bovine Respiratory Disease fatality when antimicrobials are not used for prevention; Extra-DOF: Additional Days On Feed.
Fig 3.
Additional mean costs and lost revenues per steer present in the feedlot at day 0, for the PCT, No-PC and No-PCT scenarios.
Mean estimates were used to parameterize the model for each level of incidence. PCT: Prevention Control and Treatment; No-PC: no Prevention, no Control; No-PCT: no Prevention, no Control and no Treatment; Extra-DOF: Additional Days On Feed; Loss-QG: Loss of Quality Grade.
Table 6.
Variations in feeder cattle prices and slaughter prices required for indifference between PCT, No-PCT and No-PC scenarios.