Table 1 Model parameters set to represent BVD in Irish suckler herds
From: Predicted costs and benefits of eradicating BVDV from Ireland
Parameter | Setting | Comment |
|---|---|---|
Epidemiological parameters: | ||
Prevalence of antibody positive herds | 0.75 | Estimated by AHI, range thought likely to be 0.65-0.85*. |
Prevalence of herds with one or more PI | 0.25 | Estimated by AHI, range thought likely to be 0.15-0.35*. |
Risk of virus entry to a farm in any one year | 0.19 | Based on beef finisher model (see text) |
Proportion of heifers becoming transiently infected if naive herd infected. | 0.75 | 0.75 in Gunn et al.[11] |
Proportion of cows becoming transiently infected if naive herd infected. | 0.75 | 0.75 in Gunn et al.[11] |
Financial parameters: | ||
Sale value of normal male calf (€) | 450 | [12]. |
Sale value of normal female calf (€) | 396 | Relative to male weight in Gunn et al.[11] |
Costs of immunosuppression effects (€/calf at risk) | 3.06 | Based on Gunn et al.[11] |
Opportunity cost of farm labour (€/hour) | 8.28 | [12]. |
Replacement heifer cost (€) | 1019 | [12]. |
Value of cull cow (€) | 793 | [12]. |
Veterinary charges (€/hour or visit) | 63 | Estimate supplied by AHI |
Other minor assumptions converted from £ to € | 1.1322 | Currency conversion factor |