Table 3a.

Incidence of diarrhea in one uninfected control group and four groups exposed to pathogenic serotypes of E. coli in connection with weaning (I). One infected group was left as an infected control group, while the other three groups were given feed related prophylactics (for details see Table 1). Comparisons with the infected control group are hatched. The table also shows (II) the incidence of diarrhoea in exposed pigs (n = 24) with respect to litter of origin (1–6). For both categories the presence of the F4-receptor in the intestine is given.

Group/Litter	Ratio F4 Pos/Neg	Pigs			Days
		At risk	With diarrhea		At risk	With diarrhea		Significance of difference
		(n)	(n)	(%)	(n)	(n)	(%)
I) Group								B	C	D	E
A: Uninfected control	4/2	6	0	0%	84	0	0%	***	***	***	***
B: ZnO	5/1	6	5	83%	84	38	45%				**
C: Meal feed	4/2	6	5	83%	83	30	36%				*
D: Infected control	4/2	6	6	100%	75	37	49%				**
E: Probiotic	3/3	6	6	100%	84	20	24%
II) Litter (exposed pigs)								2	3	4	5	6
1	2/2	4	4	100%	56	24	43%	*
2	0/4	4	4	100%	56	13	23%		*			**
3	4/0	4	4	100%	56	25	45%
4	4/0	4	4	100%	56	18	32%					*
5	2/2	4	3	75%	56	20	36%
6	4/0	4	4	100%	46	25	51%

Significant differences: * = p < 0.05; ** = p < 0.01 and *** = p < 0.001 (only shown at the row with the lowest group or litter number)