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Summary of epidemiological features.
| Flocks | Skikda | Annaba | El Tarf | Guelma |
|---|---|---|---|---|
| Number of turkeys | 1500 | 1200 | 1500 | 2000 |
| Age (weeks) | 18 | 18 | 19 | 17 |
| Mortality until 4 months | 5.2% | 5.7% | 5.5% | 4.9% |
| Period of disease appearance | July | July | January | February |
| Duration of clinical disease (days) | 15 | 16 | 12 | 15 |
| Mortality during the disease | 12.5% | 11.2% | 9.6% | 10.3% |
