Research Article
Ovine Paratuberculosis: A Seroprevalence Study in Dairy Flocks Reared in the Marche Region, Italy
Table 2
The sheep population in the evaluated herds in Ancona and Macerata provinces.
| | Study population | Variables | Number of herds | | | | Macerata | Ancona | N. Total/Percentage |
| | Mean | 550 (min: 110; max: 1500) | 548 (min: 130; max: 1500) | 549 (min: 110; max: 1500) | | Median | 380 | 490 | 400 | | | | | | | Herd type | Dairy | 17 | 16 | 33 (86.8%) | | Mixed production | 3 | 2 | 5 (13.2%) | | | | | | | Comisana | 8 | 10 | 18 (47.4%) | | Comisana-Sarda | 6 | 5 | 11 (28.9%) | | Fabrianese | 1 | 2 | 3 (7.9%) | | Breed | Massese | 1 | 1 | 2 (5.3%) | | Sopravvisana | 1 | — | 1 (2.6%) | | Comisana-Massese | 1 | — | 1 (2.6%) | | Comisana-Fabrianese | 1 | — | 1 (2.6%) | | Comisana-Barbaresca | 1 | — | 1 (2.6%) | | | | | | | Spring | 6 | 7 | 12 (31.6%) | | Summer | 5 | 5 | 10 (26.3%) | | Season of sampling | Autumn | 5 | 4 | 9 (23.7%) | | Winter | 5 | 2 | 7 (18.4%) | | | | | | | Lactation stage | Early/late | 11 | 10 | 21 (55.3%) | | Peak | 9 | 8 | 17 (44.7%) | | | | | | | Small (≤500) | 12 | 12 | 24 (63.1%) | | Herd consistence | Medium (>500 ≤1000) | 5 | 3 | 8 (21.1%) | | Large (≥1000) | 3 | 3 | 6 (15.8%) | | | | | | | Clinical signs | Present (diarrhoea and/or wasting) | 16 | 11 | 27 (71.0%) | | Absent | 4 | 7 | 11 (28.9%) |
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