Table 4.
Quantification of transmission for combined experiments with A/Ch/Belgium/150VB/99 (H5N2), A/Ch/Italy/1067/v99 (H7N1) and A/Anas platyrhynchos/Belgium/09-884/2008 (H5N3) on each floor system, according to the Generalized Linear Model (GLM) and the Final Size (FS) model
| Virus | Flooring | Contacts infected | Median time to detection, dpe (min–max) | GLM | FS | ||
|---|---|---|---|---|---|---|---|
| Mean IP contacts, days, 1/α (95% CI) | Transmission rate, β (95% CI) | Reproduction ratio, R0 (95% CI) | Reproduction ratio, R0 (95% CI) | ||||
| H5N2 | Grid | 7/12 | 2 (1–3) | 6·5 (3·93–8·92) | 0·24 (0·10–0·44) | 1·54 (0·84–2·24) | 1·27 (0·43–3·50) |
| H5N2 | Litter | 8/12 | 2 (1–3) | 5·5 (2·36–8·64) | 0·37 (0·14–0·61) | 2·04 (0·79–3·28) | 1·77 (0·55–4·14) |
| H7N1 | Grid | 5/11 | 1 (1–1) | 6·2 (1·73–10·67) | 0·15 (0·02–0·25) | 0·93 (0·21–1·65) | 1·03 (0·27–2·82) |
| H7N1 | Litter | 9/12 | 2 (1–7) | 6·1 (0·45–11·75) | 0·38 (0·11–0·44) | 2·32 (0·12–4·52) | 1·72 (0·68–4·14) |
| H5N3 | Grid | 0/6 | 0 (0–0·72) | ||||
| H5N3 | Litter | 0/6 | 0 (0–0·72) | ||||
CI, Confidence interval; IP, infectious period; dpe, days post-exposure.