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Potential disease threats from brought-in animals to dairy replacement or commercial calf/heifer-rearing operations
| Disease condition | Time to occurrence post-arrival |
|---|---|
| Bovine respiratory disease complex | 1–4 wk |
| Salmonellosis—acute illness or chronic carrier | Days to months |
| Infectious abortion | Days to months |
| Bovine viral diarrhea | 1 wk to months |
| Foot rot/heel warts—lameness, decreased production | Weeks to months |
| Johne's disease | Months to years |
| Bovine leukemia virus | Months to years |
