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