Parameter | Description | Source data | Central estimate (95% CI) |

Λ_{H} | Force of infection with T. parva | Fraction ever infected with T. parva | 0.0352 week^{–1}(0.0315–0.0388) |

Λ_{L} | Force of infection with LPT | Fraction of T. parva–exposed calves ever infected with LPT | 0.0685 week^{–1}(0.0576–0.0800) |

σ_{H} | Rate of loss of T. parva | Fraction of calves with T. parva infection by RLB at 1 year | 0.335 week^{–1}(0.256–0.450) |

σ_{L} | Rate of loss of LPT | Fraction of calves with LPT infection by RLB at 1 year | 0.0234 week^{–1}(0.0194–0.0278) |

μ | Fraction of high-risk calves that die | Scaled to observed no. of acute ECF deaths | 0.118 (0.079–0.168) |

η | Fraction of high-risk surviving calves with clinical ECF | Scaled to observed no. of acute ECF deaths + ECF illness | 0.486 (0.415–0.556) |