Table 1.
Description of the categorical explanatory variables related to the serological status to bacterial and viral pathogens
| Definition of the variables | % herds per level |
|---|---|
| % of pigs seropositive to Lawsonia intracellularis after 16 weeks of age | |
| < 60% | 26.83 |
| ≥ 60% | 73.17 |
| Pigs seropositive to Lawsonia intracellularis | |
| before 16 weeks of age | 51.22 |
| after 16 weeks of age | 48.78 |
| % of finishing pigs seropositive to Lawsonia intracellularis | |
| < 50% | 60.98 |
| ≥ 50% | 39.02 |
| Serological status to Mycoplasma hyopneumoniae | |
| Negative | 55 |
| Positive (at least one positive sample) | 45 |
| Serological profile to Mycoplasma hyopneumoniae | |
| Negative | 55 |
| Positive before 16 weeks of age (at least one positive sample) | 37.5 |
| Positive after 16 weeks of age (at least one positive sample) | 7.5 |
| % of pigs with antibodies against Mycoplasma hyopneumoniae before 16 weeks of age | |
| ≤ 20% | 80.49 |
| > 20% | 19.51 |
| % of pigs with antibodies against Mycoplasma hyopneumoniae before 16 weeks of age | |
| ≤ 10% | 73.17 |
| > 10% | 26.83 |
| % of pigs with antibodies against Mycoplasma hyopneumoniae after 16 weeks of age | |
| ≤ 10% | 80.49 |
| > 10% | 19.51 |
| % of pigs with antibodies against Mycoplasma hyopneumoniae during the finishing phase | |
| ≤ 10% | 78.05 |
| > 10% | 21.95 |
| % of pigs with antibodies against swine Influenza A virus | |
| ≤ 20% | 56.1 |
| > 20% | 43.9 |
| % of pigs with antibodies against swine Influenza A virus | |
| ≤ 80% | 70.73 |
| > 80% | 29.27 |
| Serological status to swine Influenza A virus | |
| Negative | 46.34 |
| Positive (at least one positive sample) | 53.66 |
| Antibodies against PRRSV before 16 weeks of age | |
| No | 80.49 |
| Yes (at least one positive pool) | 19.51 |
| Antibodies against PRRSV after 16 weeks of age | |
| No | 56.1 |
| Yes (at least one positive pool) | 43.9 |
| Serological status to PRRSV | |
| Negative | 56.1 |
| Positive (at least one positive pool) | 43.9 |
| Serological profile to PRRSV | |
| Negative | 56.1 |
| Positive before 16 weeks of age (at least one positive pool) | 19.51 |
| Positive after 16 weeks of age (at least one positive pool) | 24.39 |
| % of pigs with antibodies against Porcine Circovirus Type 2 (PCV2) before 16 weeks of age | |
| ≤ 50% | 29.27 |
| > 50% | 70.73 |
| % of pigs with antibodies against Porcine PCV2 after 16 weeks of age | |
| ≤ 70% | 19.51 |
| > 70% | 80.49 |
| Anti-PCV2 IgG antibody titers > 5000 ELISA units before 16 weeks of age | |
| No | 85.37 |
| Yes (at least one pig) | 14.63 |
| Anti-PCV2 IgG antibody titers > 5000 ELISA units after 16 weeks of age | |
| No | 31.71 |
| Yes (at least one pig) | 68.29 |
| Anti-PCV2 IgG antibody titers > 5000 ELISA units during the fattening phase | |
| No | 31.71 |
| Yes (at least one pig) | 68.29 |
| > 10% of pigs with a SERELISA® titer > 5000 ELISA Units for antibodies against PCV2 | |
| No | 41.46 |
| Yes | 58.54 |
| > 20% of pigs with a SERELISA® titer > 5000 ELISA Units for antibodies against PCV2 | |
| No | 51.22 |
| Yes | 48.78 |