Table 6.

Average c.f.u. count with the standard deviation (s.d.), expressed per million (10⁶), for three ECO157 strains, St1, St2 and St3, in bovine faeces during the survivability assay

Day	St1		St2		St3
	Mean	s.d.	Mean	s.d.	Mean	s.d.
0	38·40	17·40	35·10	9·31	39·50	24·10
1	6·61	4·24	4·55	0·92	1·17	1·58
3	5·78	6·53	1·33	0·32	0·33	0·42
7	4·44	5·46	0·64	0·25	0·18	0·24
10	3·05	3·92	0·68	0·24	0·16	0·26
14	1·90	2·50	0·47	0·12	0·10	0·15
17	3·42	4·76	0·40	0·12	0·12	0·17
21	1·51	2·11	0·10	0·03	0·02	0·03
24	2·09	2·94	0·10	0·04	0·01	0·02
28	2·54	3·59	0·03	0·02	0·01	0·01