origin | material | method | number of investigated herds | herd prevalences | reference |
---|---|---|---|---|---|
Denmark | Bulk-tank milk samples | ELISA | 900 | 47% | |
UK | Bulk-tank milk samples | PCR | 244 | 7.8% | [30] |
Austria | Serum samples | ELISA | 2757 | 6.96%a | [33] |
Belgian | Serum samples | ELISA | 464 | 18% | [41] |
Netherlands | Serum samples | ELISA | 378 | 54.7% | [42] |
Canada | Serum samples | ELISA | 90 | 43.3% | [43] |
Missouri | Serum samples | ELISA | 89 | 47% | [44] |
Wisconsin | Serum samples | ELISA | 158 | 50%b | [32] |
Michigan | Serum samples | ELISA | 121 | 55.4% | [45] |