Table 1.

General description of the farms (n = 10) and diagnostic information about Brachyspira hyodysenteriae

	Farm number
	1	2	3	4	5	6	7	8	9	10
Type of farma	gilt rearing	farrow-to-finish	sow	fattening	farrow-to-finish	fattening	sow	sow	fattening	fattening
Farm sizeb	1050	160	480	430	125	9000	280	550	2600	2300
Purchase of animals	at 10 weeks	breeding gilts at 7 months	no	at 10 weeks	no	at 10 weeks	no	no	at 10 weeks	at 10 weeks
All-in/all-out at … level
Site	no	no	no	yes	no	no	no	no	no	no
Barn	no	no	no	yes	no	yes	no	no	no	yes
Room	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Type of feed
Sows	meal	pellets	meal		pellets		meal	meal
Fattening pigs / gilts	meal	meal		meal	meal	meal			meal	meal
Brachyspira hyodysenteriaec
Detected by …	PCR	PCR, culture	PCR, culture	culture	PCR	culture	PCR, culture	culture	culture	culture
Other Brachyspira spp. (culture)c	pilosicoli, murdochii, innocens				murdochii	murdochii

^a Gilt rearing: from 10 weeks until pregnancy testing; sow farm: pigs raised until 10 weeks of age

^b Farm size: number of gilts (gilt rearing), sows (sow farm / farrow-to-finish), fattening pigs (fattening)

^c Based on diagnostics during the last year prior to the study