Table 1.
Age at initial colonization of broiler chicks naturally colonized with Campylobacter on farms A and B and dates of introduction of day-old chickens
| Location and flock or parameter | Date (day.mo.yr) of 1st day in cage brooder | Age (days) at: |
Slaughter date | |
|---|---|---|---|---|
| Introduction into poultry house | Initial colonization | |||
| Farm Ab | ||||
| 1A | NAa | 1 (15.10.07)d | 20 | 23.11.07 |
| 2A | NA | 1 (28.01.08) | 20 | 06.03.08 |
| 3A | NA | 1 (01.05.08) | 26 | 06.06.08 |
| 4A | NA | 1 (04.08.08) | 26 | 15.09.08 |
| Mean | 23 | |||
| Farm Bc | ||||
| 1B | 11.10.07 | 15 | 20 | 22.11.07 |
| 2B | 01.12.07 | 15 | 20 | 11.01.08 |
| 3B | 13.12.07 | 15 | 20 | 23.01.08 |
| 4B | 20.12.07 | 16 | 20 | 30.01.08 |
| 5B | 28.12.07 | 14 | 14 | 06.02.08 |
| 6B | 07.01.08 | 15 | 22 | 18.02.08 |
| 7B | 14.01.08 | 15 | 22 | 25.02.08 |
| 8B | 25.01.08 | 15 | 19 | 07.03.08 |
| 9B | 19.02.08 | 16 | 26 | 02.04.08 |
| 10B | 24.02.08 | 16 | 22 | 05.04.08 |
| 11B | 07.04.08 | 15 | 22 | 16.05.08 |
| 12B | 22.04.08 | 15 | 17 | 02.06.08 |
| 13B | 29.04.08 | 15 | 19 | 09.06.08 |
| 14B | 03.06.08 | 15 | 23 | 08.07.08 |
| 15B | 03.06.08 | 15 | 23 | 14.07.08 |
| 16B | 03.08.08 | 15 | 19 | 19.09.08 |
| Mean | 20.3 | |||
a
NA, not applicable.
b
All-in, all-out system.
c
Multiple-age system.
d
The date is in parentheses.