TABLE 3.

Transmission of E. coli cocktail strains to six naïve sheep

Strain	Pathotype	Time	No. of naïve animals positive/no. exposed to inoculated donors sheddingaE. coli at the following CFU/g:
			<102	102	103	104	105	106
86-24	STEC	Initial	1/2	0/1		2/2	0/1
		2 wk	0/2	1/1		2/2	1/1
		2 mo	0/2	0/1		0/2	0/1
3081	STEC	Initial	0/2	0/1	1/1	1/2
		2 wk	0/2	0/1	0/1	1/2
		2 mo	0/2	0/1	0/1	0/2
2041	ETEC	Initial		1/1		2/2	2/2	0/1
		2 wk		1/1		1/2	0/2	1/1
		2 mo		0/1		0/2	0/2	0/1
E2348/69	EPEC	Initial	1/4	0/1		0/1
		2 wk	0/4	0/1		0/1
		2 mo	0/4	0/1		0/1
637	ETEC	Initial		0/2	0/3		1/1
		2 wk		0/2	0/3		0/1
		2 mo		0/2	0/3		0/1

^aAt the time of exposure to a naïve animal.