Investigation of the Distribution of Salmonella within an Integrated Pig Breeding and Production Organisation in the United Kingdom

Table 2

Number and size of pig farms in the study and their Salmonella status.

Pig category	Herd size	Number of farms sampled	Number of farms Salmonella-positive
			Any serovar	S. Typhimurium
Nursery	<201	0	0	0
	201–500	10	5	2
	501–800	13	11	9
	801–1100	6	6	6
	1101–1400	11	7	6
	1401–1700	7	7	7
	1701–2000	6	3	2
	>2000	6	4	3
Nursery totals		59	43	35
Finishing	<201	6	3	2
	201–500	19	11	6
	501–800	15	10	9
	801–1100	19	12	10
	1101–1400	14	10	8
	1401–1700	7	5	4
	1701–2000	6	5	5
	>2000	14	11	11
	Unknown	2	1	1
Finishing totals		102	68	56