From: Recurring outbreaks by the same Escherichia coli ST10 clone in a broiler unit during 18 months
First week mortality (%) | Total mortality (%) | Weight first-week (g) | Weight at slaughter (g) | Age at slaughter (d) | Condemnation at slaughter (%) | No. of chicks per rotation | ||
---|---|---|---|---|---|---|---|---|
Affected rotations | ||||||||
Mean | 1.6 | 13.1a | 173.5 | 2247 | 34.4 | 1.4 | 34 150 | |
Stdv | 2.2 | 5.3 | 15.8 | 221 | 1.7 | 0.4 | 1870 | |
Range | 0.6–7.8 | 6.1–21.7 | 150–210 | 1693–2523 | 31.1–37.6 | 0.7–1.8 | 32 500–39 000 | |
Non-affected rotations | ||||||||
Mean | 0.6 | 2.7 | 170.8 | 2128 | 34.9 | 1.9 | 33 680 | |
Stdv | 0.3 | 0.9 | 7.1 | 232 | 1.8 | 2.7 | 2448 | |
Range | 0.4–1.2 | 1.5–4.5 | 160–180 | 1735–2474 | 32.2–37.3 | 0.4–9.4 | 29 000–37 000 |