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 16Â 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 16Â weeks of age | |
  ≤ 20% | 80.49 |
  > 20% | 19.51 |
% of pigs with antibodies against Mycoplasma hyopneumoniae before 16Â weeks of age | |
  ≤ 10% | 73.17 |
  > 10% | 26.83 |
% of pigs with antibodies against Mycoplasma hyopneumoniae after 16Â 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 16Â weeks of age | |
 No | 80.49 |
 Yes (at least one positive pool) | 19.51 |
Antibodies against PRRSV after 16Â 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 16Â weeks of age | |
  ≤ 50% | 29.27 |
  > 50% | 70.73 |
% of pigs with antibodies against Porcine PCV2 after 16Â 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 |