Table 1.
The paratuberculosis seroprevalence in dairy cattle herds divided into groups of lactation.
| Result Test | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lactation | Screening Test | Verification Test | ||||||
| Number of Samples Examined | + | +/− | − | Number of Samples Examined | + | − | ||
| Herd A | I | 213 | 9 | 0 | 204 | 0 | 0 | 0 |
| II | 136 | 9 | 1 | 126 | 1 | 1 | 0 | |
| III | 48 a | 3 | 0 | 45 | 0 | 0 | 0 | |
| >III | 57 | 4 | 0 | 53 | 0 | 0 | 0 | |
| Total | 454 b | 25 | 1 | 428 | 1 | 1 | 0 | |
| Herd B | I | 139 | 10 | 3 | 126 | 3 | 2 | 1 |
| II | 119 | 10 | 3 | 106 | 3 | 2 | 1 | |
| III | 98 a | 14 | 1 | 83 | 1 | 1 | 0 | |
| >III | 68 | 8 | 2 | 58 | 2 | 1 | 1 | |
| Total | 424 b | 42 | 9 | 373 | 9 | 6 | 3 | |
+ seropositive; − seronegative; +/− doubtful; statistical significance between results: a p = 0.047; b p = 0.003; no statistical significance was observed between the other results.