Table 2.
Economic parameters and inter-quartile ranges (IQR) used in a model of Mycobacterium avium subsp. paratuberculosis control in dairy herds.
| Cost | Description | Value (IQR) | Reference |
|---|---|---|---|
| prev | prevalence of MAP infection in purchased cows | 0.094 (0.077–0.111) | (Adaska and Anderson, 2003) |
| CFC | cost of fecal culture test per animal | $36 ($25–$42) | (Besser, 2015; Collins and Manning, 2015; Cornell University Animal Health Diagnostic Center, 2015; “Tests and Fees,” 2015) |
| CE | cost of ELISA test per animal | $6 ($4–$8) | (Besser, 2015; Collins and Manning, 2015; Cornell University Animal Health Diagnostic Center, 2015; Indiana Animal Disease Diagnostic Laboratory, 2015; “Tests and Fees,” 2015) |
| CP | cost of PCR test per animal | $32 ($32–40) | (Besser, 2015; Collins and Manning, 2015; Cornell University Animal Health Diagnostic Center, 2015; Indiana Animal Disease Diagnostic Laboratory, 201 5; “Tests and Fees,” 2015) |
| ωhyg,mod | Annual cost of implementing moderate hygiene per adult (clean milk) | $35.54 | (Wolf et al., 2014) |
| ωhyg,large | Annual cost of implementing improved hygiene per adult (clean milk, separate calving pens, separate housing) | $49.64 | (Wolf et al., 2014) |
| Ccow | Daily operating cost per kg milk produced | $0.35 (0.33–0.37) | (USDA:ERS, 2010) |
| Cheifer | Daily operating cost of raising a calf/heifer | $2.995 (2.662–3.403) | (Karszes, 2014) |
| Pcow | Cull-cow price per kg | $1.9671 (1.7292–2.31) | (USDA:NASS, 2015) |
| Pmilk | Milk price per kg | $0.444 (0.394–0.482) | (USDA:NASS, 2015) |
| Psale | Sale price of replacement heifer | $2232 (2000–2500) | (Karszes, 2014) |
| Qcull | Average cull cow weight | 680.4 kg (660–700) | (USDA, 2008) |
| Qmilk,X | Average daily milk production per uninfected cow | 32.62 kg (25.45–42.73) | (Smith et al., 2016) |
| Qmilk,EL | Average daily milk production per latent cow (low path) | 32.17 kg (24.09–42.73) | (Smith et al., 2016) |
| Qmilk,LL | Average daily milk production per low-shedding cow (low path) | 30.94 kg (24.09–42.73) | (Smith et al., 2016) |
| Qmilk,EH | Average daily milk production per latent cow (high path) | 33.12 kg (22.27–39.09) | (Smith et al., 2016) |
| Qmilk,LH | Average daily milk production per low-shedding cow (high path) | 29.13 kg (22.27–39.09) | (Smith et al., 2016) |
| Qmilk,H | Average daily milk production per high-shedding cow | 22.17 kg (12.27–32.27) | (Smith et al., 2016) |
| ψH | Proportional adjustment in cull weight for high-shedding cows | 0.9 (0.75–1) | assumed |
| RPO | retention pay-off of a clinical animal | $1,351 ($0–$4,099) | (Groenendaal and Wolf, 2008b) |
| r | Discount rate | 0.02 (0.01–0.08) | assumed |