Table 2.
Percentage of poultry in each treatment group with positive H5 and Newcastle disease (ND) titres (⩾24), stratified by age (adult vs. young birds) over the entire study period
| Percent of population with positive titre (95% CI) | ||||
|---|---|---|---|---|
| H5 | ND | |||
| Treatment block | Young | Adult | Young | Adult |
| Control | 1·0 (0·6–1·4) | 2·4 (2·0–2·9) | 5·5 (4·69–6·4) | 10·2 (9·3–11·1) |
| AI vaccination | 23·0 (21·4–25·0) | 39·2 (37·8–40·5) | 3·0 (2·3–3·6) | 9·4 (8·6–10·2) |
| AI and ND vaccination | 19·5 (17·9–21·1) | 31·6 (30·3–32·9) | 12·5 (11·2–13·8) | 22·7 (21·6–23·9) |
AI, Avian influenza; CI, Confidence interval.