Table II.
Results of multiplex polymerase chain reaction (m-PCR) testing for S. suis species in the environmental samples collected at the 8 farms
| Farm number | Pig group | n | PCR+ | Sample source (and number) |
|---|---|---|---|---|
| 1 | S | 12 | 0 | |
| WP | 15 | 2 | Drinking water (2) | |
| FP | 17 | 0 | ||
| Total | 44 | 2 | ||
| 2 | S | 16 | 2 | Feeding trough (2) |
| WP | 19 | 7 | Feed (1), drinking water (2), feces (1), dust (1), feeding trough (2) | |
| FP | 18 | 2 | Feeding trough (2) | |
| Total | 53 | 11 | ||
| 3 | S | 12 | 3 | Dust (1), feeding trough (2) |
| WP | 12 | 5 | Feed (2), feces (1), feeding trough (2) | |
| FP | 18 | 1 | Feeding trough (1) | |
| Total | 42 | 9 | ||
| 4 | S | 12 | 2 | Feed (2) |
| WP | 19 | 1 | Drinking water (1) | |
| FP | 13 | 5 | Feed (1), litter (2), dust (1), clothes drag-swab (1) | |
| Total | 44 | 8 | ||
| 5 | S | 16 | 6 | Feed (1), feeding trough (2), fly (3) |
| WP | 15 | 8 | Drinking water (3), dust (3), feeding trough (2) | |
| FP | 14 | 0 | ||
| Total | 45 | 14 | ||
| 6 | S | 12 | 6 | Feed (2), feces (1), feeding trough (2), drag-swab on sow (1) |
| WP | 12 | 0 | ||
| FP | 21 | 3 | Drinking water (3) | |
| Total | 45 | 9 | ||
| 7 | S | 12 | 0 | |
| WP | 13 | 1 | Feed (1) | |
| FP | 15 | 0 | ||
| Total | 40 | 1 | ||
| 8 | S | 14 | 4 | Feed (1), feeding trough (3) |
| WP | 13 | 0 | ||
| FP | 14 | 0 | ||
| Total | 41 | 4 | ||
| Total | 354 | 58 |
S — sows; WP — weaned pigs; FP — fattening pigs; n — number of samples analyzed; PCR+ — number of samples positive for S. suis species by m-PCR.