Table 1 Farms features and some management practices of sampled farms
Farm code | Farm one (2FTP) | Farm two (TSO) | Farm three (MTH) | Farm four (CHA) | Farm five (CHB) | Farm six (CHC) | Farm seven (CHD) |
|---|---|---|---|---|---|---|---|
Herds population | >5000 | 100 | 80 | 200 | 250 | 50 | 70 |
Herds composition | Weaners and growers | Sows, weaners, growers and boars | Sows, weaners, growers and boars | Sows, weaners, growers and boars | Sows, weaners, growers and boars | Sows, weaners, growers and boars | Sows, weaners, growers and boars |
Breeds | Large white and Landrace | Large white | Large white | Large white and Landrace | Large white and Landrace | Large white | Large white |
Biosecurity measures | High | Very low | None | Very low | Low | None | None |
Biocide use | Virocide | Nil | Nil | Dazzel dip | Dazzel dip | Nil | Nil |
Vaccination regime | Nil | Nil | Nil | Nil | Nil | Nil | Nil |
Antibiotics use | Applied in cases of infections | Occasionally in cases of infections | Applied in cases of infections | Applied in cases of infections | Occasionally in cases of infections | Occasionally in cases of infections | Occasionally in cases of infections |
Antibiotic/drugs use | Norotrim, Depomycin, Lantrax, Kyroligo, Advocin UltaJet, | Iron, Ivomec / dectomaxn | Iron, Ivomec / dectomax | Iron, Ivomec / dectomax | Iron, Ivomec / dectomax | Iron, Ivomec / dectomax | Iron, Ivomec / dectomax |
All-in/All-out practice | Yes | No | No | Yes, but not always | Yes, but not always | No | No |
Disease symptoms and occurrence | Swollen lymph nodes, meningitis, respiratory disorders, red cat, gastric ulcers, scrotal and navel hernia | Swollen lymph nodes, respiratory disorders | Meningitis, respiratory disorders, gastric ulcers, hernia | Wasting, Swollen lymph nodes, respiratory disorders, dysentery | Respiratory disorders | Swollen lymph nodes | Swollen lymph nodes, meningitis, respiratory disorders |
Prior knowledge of PCV2 infections | Yes | No | No | No | No | No | No |
Cases of abortion | Not applicable | Occasionally | Occasionally | Occasionally | Occasionally | Occasionally | Occasionally |