A descriptive study of acute outbreaks of respiratory disease in Norwegian fattening pig herds

Table 1 Overview of descriptive data in both outbreak and non-outbreak herds (n = 14)

Descriptive herd data	Outbreak herds (n = 7)^a		Non-outbreak herds (n = 7)^b
	Median	Interquartile range	Median	Interquartile range
Production site	Single site production
No. of suppliers	2	7	1	0
Herd size^c	650	310	500	350
Yearly yield^d	2109	1818	1543	1661
*Estimations from on-farm registrations:*
Pigs in compartment^e	155	90	196	255
Compartment volume per pig^f	3.9 m³	2 m³	4.3 m³	1.5 m³
Floor space per pig^g	1.0 m²	0.2 m²	1.1 m²	0.2 m²

^aHerd type: 5 finishers, 2 farrow-to-finish. 6 herds: one compartment affected and tested. 1 herd: two compartments affected and tested, compartment average presented
^bHerd type: 6 finishers, 1 farrow-to-finish. One compartment tested per herd
^cNumber of pigs in the herd/at the production site at the time of the outbreak/sampling
^dFattening pigs slaughtered over the last 12 months. Not considering piglets for sale
^eNumber of pigs the compartment with the ongoing outbreak
^fm³ in the compartment divided by the number of pigs
^gtotal m² in the compartment divided by the number of pigs, not considering empty stalls, walkways etc

ISSN: 1751-0147