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Prevalence of C. botulinum type B in feces from outdoor and indoor pigs regarding seasonal variation
| Season | No. of positive samples/no. of samples examined (%) for pigs reared:
|
|
|---|---|---|
| Outdoors | Indoors | |
| Summer | ||
| Southern Sweden | 0/12 (0) | 6/6 (100) |
| Central Sweden | 2/9 (22) | 13/18 (72) |
| Total | 2/21 (10) | 19/24 (79) |
| Winter | ||
| Southern Sweden | 8/10 (80) | 9/9 (100) |
| Central Sweden | 2/5 (40) | 8/9 (89) |
| Total | 10/15 (67) | 17/18 (94) |
