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Share of Listeria spp. and Listeria monocytogenes in feed depending of type of farm and season.
| Season | Organic farming | Conventional farming | ||||
|---|---|---|---|---|---|---|
| Number of samples | Listeria spp., n (%) | L. monocytogenes, n (%) | Number of samples | Listeria spp., n (%) | L. monocytogenes, n (%) | |
| Winter | 19 | 4 (7.4) | 10 (18.5) | 30 | 2 (2.6) | 8 (10.5) |
| Spring | 14 | 2 (3.7) | 2 (3.7) | 14 | 0 | 0 |
| Summer | 6 | 0 | 0 | 14 | 0 | 0 |
| Autumn | 15 | 2 (3.7) | 4 (7.4) | 18 | 2 (2.6) | 2 (2.6) |
| Total | 54 | 8 (14.8) | 16 (29.6) | 76 | 4 (5.2) | 10 (13.1) |
