TABLE 1.

Numbers of samples positive in the vtx PCR screening and VTEC isolates obtained from these samples

Farm	No. of PCR-positive samples/total [no. of isolates (no. of samples with isolates)]
	Production animals (cattle or pigs)	Birds	Rodents	Pet animals	Insects	Other animalsa
Cattle
A	4/20 [5 (1)]	0/35			0/1
B	8/20 [12 (5)]	1/32 [0]	2/2 [1 (1)]	0/2	0/1
C	2/20 [6 (2)]	1/28 [6 (1)]		0/2
D	9/18 [0 (0)]	0/30		0/1		0/11
Total	23/78c	2/125	2/2	0/5	0/2	0/11
Pigs
E	1/20 [0]	2/30 [0]	0/2	0/2	0/1	1/3b [0]
F	1/20 [0]	0/30	0/4	0/2	0/1
G	0/20	0/30	0/2	0/3	0/1	0/2
H	0/20	0/29			0/1
Total	2/80d	2/119	0/8	0/7	0/4	1/5

^aOther animals included hens (2 samples), horses (2 samples), cattle (2 samples at a pig farm), and pigs (10 samples on a cattle farm).

^bThe PCR-positive samples were from cows (categorized as “other animals” at a pig farm).

^c29.5%.

^d2.5%.