Table 2.
Model parameters, the highest posterior density interval (HPD) from the approximate Bayesian computation (sequential Monte Carlo algorithm), and the final parameter values applied to the agent-based model to simulate African swine fever transmission in Singapore's wild boar population.
| Parameter | Median (95% HPD) | Value used in model | Source |
|---|---|---|---|
| β I: Transmission probability by an infected agent | 0.77 (0.55, 1.0) | Bernoulli, p=0.8 | de Carvalho Ferreira et al. [48]; Eblé et al. [50] |
| β D: Transmission probability through contact with an infectious carcass | 0.75 (0.52, 0.98) | Bernoulli, p=0.8 | Guinat et al. [49]; Gallardo et al. [52] |
| β R: Transmission probability by a carrier (recovered) agent | 0.52 (0.07, 0.99) | Bernoulli, p=0.5 | Eblé et al. [50] |
| μ A: Probability of death following acute infection | 0.89 (0.80, 0.98) | Bernoulli, p=0.9 | Walczak et al. [53] |
| μ C: Probability of death following chronic infection | — | Bernoulli, p=0.45 | Assumed as 50% of acute infection |
| γ: Probability to recover from the disease | 0.10 (0.02, 0.19) | Bernoulli, p=0.1 | Inversely proportional to μA |
| σ: Severity of infection | — | Bernoulli, p=0.9 | Gallardo et al. [52] |
| Duration of incubation period for exposed agents | 4 (3, 5.9) | Poisson, λ = 7 days | Guinat et al. [49]; Walczak et al. [53]; Lee et al. [54] |
| Duration of infectious period of carrier (recovered) agents | — | Poisson, λ = 24 days | Eblé et al. [50] |
| Duration of carcass persistence in tropics (without and with carcass removal) | — | Poisson, λ = 10 and 3 days | Mazur-Panasiuk et al. [55]; Nuanualsuwan et al. [56]; Lamperty et al. [15]; Leivers et al. [7] |
| Time to death following an acute infection | — | Poisson, λ = 4 days | Walczak et al. [53] |
| Time to death following a chronic infection | — | Poisson, λ = 24 days | Eblé et al. [50] |
| Duration of immune period following recovery from the disease | — | Poisson, λ = 24 days | Eblé et al. [50] |
| Mean distance traveled per day | — | 4 km | Janeau et al. [57] |