Table 1.
Number and proportion of batches found to be colonized at different levels in pooled caecal samples (results from 2314 batches included in the UK poultry industry study on enhanced biosecurity and Campylobacter colonization, UK, 2011–2013)
| Results | At thinning | At depopulation | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Control farms 1 (%) | Control farms 2 (%) | Control farms 3 (%) | Model farms (%) | Control farms 1 (%) | Control farms 2 (%) | Control farms 3 (%) | Model farms (%) | Total (%) | |
| 1 to <100 c.f.u./g | 21 | 4 | 29 | 338 | 23 | 0 | 11 | 191 | 617 |
| (10·6) | (25·0) | (43·3) | (41·2) | (11·5) | (15·9) | (20·6) | (26·7) | ||
| 100 to 1000 c.f.u./g | 1 | 0 | 1 | 32 | 0 | 1 | 1 | 41 | 77 |
| (0·5) | (1·5) | (3·9) | (7·1) | (1·4) | (4·4) | (3·3) | |||
| >1000 c.f.u./g | 177 | 12 | 37 | 450 | 177 | 13 | 57 | 697 | 1620 |
| (88·9) | (75·0) | (55·2) | (54·9) | (88·5) | (92·9) | (82·6) | (75·0) | (70·0) | |
| >1000 to ⩽123 000 c.f.u./g | 32 | 2 | 2 | 108 | 17 | 3 | 3 | 96 | 263 |
| (16·1) | (12·5) | (3·0) | (13·2) | (8·5) | (21·4) | (4·3) | (10·3) | (11·4) | |
| >123 000 c.f.u./g | 145 | 10 | 35 | 342 | 160 | 10 | 54 | 601 | 1357 |
| (72·9) | (62·5) | (52·2) | (41·7) | (80·0) | (71·4) | (78·3) | (64·7) | (58·6) | |
| Total | 199 | 16 | 67 | 820 | 200 | 14 | 69 | 929 | 2314 |