Table 5.

Jejunal morphology and enterocyte proliferation in the crypt of pigs challenged with F18-positive Escherichia coli and fed diets supplemented with antibiotic (bacitracin methylene disalicylate) or Lactobacillus fermentate (LBF)

Item	Treatment1				SEM	P-value
	NC	PC	AGP	PBT		NC vs. PC	PC vs. AGP	PC vs. PBT
Villus height, µm	369	309	377	362	22.64	0.068	0.038	0.102
Villus width, µm	118	110	118	116	4.22	0.194	0.204	0.295
Crypt depth, µm	213	230	219	248	10.29	0.259	0.475	0.227
VH:CD2	1.74	1.35	1.75	1.48	0.10	0.011	0.009	0.362
Ki67+3, %	27.70	36.16	32.42	26.96	1.34	<0.001	0.034	<0.001

Treatments: NC, no-challenge/no-supplement; PC, E. coli challenge/no-supplement; AGP, E. coli challenge/bacitracin (30 g/t feed); and PBT, E. coli challenge/LBF (2 kg/t feed; LBiotix, Adare Biome, Houdan, France).

Villus height to crypt depth ratio.

Enterocyte proliferation in the crypt.