Table 2.
Ability and timeliness of mortality and egg production thresholds to signal highly and low pathogenic avian influenza outbreaks.
| HPAI | LPAI | |||
|---|---|---|---|---|
| No. detected/No. tested (%) | Days earlier detection (range) | No. detected/No. tested (%) | Days earlier detection (range) | |
| Mortality | ||||
| CUSUM | 5/7 (71.4) | 2 (0–6) | 8/9 (89.0) | 6 (0–89) |
| Ratio >2.9 | 5/7 (71.4) | 2 (0–6) | 7/9 (77.8) | 7 (3–89) |
| Mortality % >0.08/0.13 | 5/7 (71.4) | 2 (0–5) | 6/9 (66.7) | 5 (3–89) |
| Mortality % >0.25% (2 day) | 3/7 (43.0) | 0 (0–1) | 0/9 (0.0) | |
| Mortality % >0.5% (2 day) | 3/7 (43.0) | 0 (0–1) | 0/9 (0.0) | |
| Mortality % >0.25% (1 day) | 6/7 (85.7) | 0 (0–2) | 0/9 (0.0) | |
| Mortality % >0.5% (1 day) | 5/7 (71.4) | 0 (0–2) | 0/9 (0.0) | |
| Egg production | ||||
| CUSUM | 1/6 (16.7) | 0 | 3/6 (50.0) | 6 (2–6) |
| Ratio <0.94 | 2/6 (33.3) | 0 (0–1) | 4/6 (66.7) | 6 (1–7) |
Data from recent outbreaks (2012–2016) were used for this analysis.