Table 1 Description of the ten study herds (A–J) enrolled in the study
From: Impact of diversity of Mycoplasma hyopneumoniae strains on lung lesions in slaughter pigs
Herd | A | B | C | D | E | F | G | H | I | J |
|---|---|---|---|---|---|---|---|---|---|---|
Number of sows | 170 | 200 | 250 | 200 | 150 | 250 | 200 | 250 | 150 | 125 |
Sows breed | LW (50%) + ELR (25%) + FLR (25%) | Topigs | ELR (50%) + FLR (50%) | Danbred (70%) + Hypor | Topigs | Topigs | Danbred | Rattlerow-Seghers | Hypor (90%) + Danbred (10%) | Hypor |
Batch production system for sows | 3-week | 3-week | 4-week | 3-week | Day system | 1-week | 4-week | 1-week | 4-week | 4-week |
Stocking density nursery (m2/animal) | >0.30 | <0.30 | <0.30 | >0.30 | <0.30 | >0.30 | <0.30 | >0.30 | >0.30 | <0.30 |
Stocking density fatteners (m2/animal) | >0.70 | >0.7 | 0.65–0.70 | 0.65–0.7 | 0.7 | <0.65 | 0.65–0.70 | 0.65–0.70 | 0.65–0.70 | 0.65 |
Purchase of gilts (occasions per year) | No | Yes (5) | No | Yes (4) | Yes (4) | No | No | Yes (8) | Yes every montha | Yes (5) |
Duration of quarantine period for gilts | n.a. | 9 week | n.a. | 8 week | 4 week | n.a. | n.a. | No | 4 week | 6 week |
Mycoplasma hyopneumoniae vaccination gilts | No | Yes | No | Yes | No | No | No | No | Yes | No |
Age (days) at vaccination of piglets against M. hyopneumoniae | 8 and 26 | 21 | 14 | 7 | 14 | 7 | 35 | 3–8 and 28 | 18 | 21 |
Other vaccinations in piglets | No | PCV-2 (21) | No | PRRSv (18) | PCV-2 (14) | No | PCV-2 (35) | No | PCV-2 (18) | No |
Age at weaning (days of age) | 26 | 26 | 21 | 23 | 25 | 24 | 19 | 28 | 20–21 | 21 |
Clinical signs of M. hyopneumoniae | No | No | No | Yes | Yes | No | No | No | No | No |
Coughing score for fattening pigs provided by the farmer (0–10) | 3 | 2 | 0 | 7 | 4 | 2 | 3 | 0 | 1 | 0 |