TABLE 3.
Transmission coefficients (βwithin and βbetween, 95% CI) using an SI-model for transmission based on the proportion of excreting birds (model 1) and the accumulative excretion time (model 2).
| Transmission coefficient (β, 95% CI) | ||||
| Unit* | βwithin (95% CI) | βbetween (95% CI) | AIC | |
| Model 1 proportion excreting birds | day–1 | 1.31 (1.07–1.59) | 0.03 (0.02–0.04) | 438.1 |
| Model 2 accumulative excretion time | day–2 | 6.12 × 10–2 (4.78 × 10–2–7.64 × 10–2) | 3.28 × 10–4 (2.41 × 10–4–4.32 × 10–4) | 402.1 |
* The unit in model 1 is 1/day, and is interpreted as the number of new colonized broilers due to one positive broiler per day. The unit in model 2 is 1/day2 and is interpreted as the number of new colonized broilers caused by each day that one positive broiler has been excreting.