Table 1.
Estimation of the transmission parameters [95 % Confidence Interval] for MDA +H ( n = 26), MDA +L ( n = 7) and MDA − ( n = 33) piglets
| Transmission rates | Susceptibility factors | BIC | |||
|---|---|---|---|---|---|
| β (days −1 ) | β air (days −1 ) | σ H | σ L | ||
| Model 1 | 2.48 [1.08–4.56] |
1.43 [0.64–2.74] |
0.38 [0.20–0.72] |
0.92 [0.35–2.18] |
127.3 |
| Model 2 | 2.43 [1.09–4.23] |
1.41 [0.64–2.63] |
0.39 [0.21–0.70] |
– | 116.2 |
| Model 3 | 2.60 [1.20–4.69] |
1.35 [0.60–2.62] |
0.45a
[0.25–0.83] |
119.4 | |
Overall population estimate applying to MDA+H and MDA+L piglets; BIC: Bayesian Information Criteria
With β being the direct transmission rate, β air the airborne transmission rate, σ H the susceptibility factor for MDA+H piglets and σ L the susceptibility factor for MDA+L piglets.
Model 1: different susceptibility factors for MDA+H, MDA+L and MDA− piglets (σ H ≠ σ L and σ H,L < 1).
Model 2: same susceptibility factor for MDA+L and MDA− piglets (σ L = 1 and σ H < 1).
Model 3: same susceptibility factor for MDA+H and MDA+L piglets (σ H = σ L et σ H,L < 1).