Table 2.
Number and size of pig farms in the study and their Salmonella status.
| Pig category | Herd size | Number of farms sampled | Number of farms Salmonella-positive | |
|---|---|---|---|---|
| Any serovar | S. Typhimurium | |||
| Nursery | <201 | 0 | 0 | 0 |
| 201–500 | 10 | 5 | 2 | |
| 501–800 | 13 | 11 | 9 | |
| 801–1100 | 6 | 6 | 6 | |
| 1101–1400 | 11 | 7 | 6 | |
| 1401–1700 | 7 | 7 | 7 | |
| 1701–2000 | 6 | 3 | 2 | |
| >2000 | 6 | 4 | 3 | |
| Nursery totals | 59 | 43 | 35 | |
|
| ||||
| Finishing | <201 | 6 | 3 | 2 |
| 201–500 | 19 | 11 | 6 | |
| 501–800 | 15 | 10 | 9 | |
| 801–1100 | 19 | 12 | 10 | |
| 1101–1400 | 14 | 10 | 8 | |
| 1401–1700 | 7 | 5 | 4 | |
| 1701–2000 | 6 | 5 | 5 | |
| >2000 | 14 | 11 | 11 | |
| Unknown | 2 | 1 | 1 | |
| Finishing totals | 102 | 68 | 56 | |