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FIGURE 4

Histological sections of the gastric wall of mice fed the purified and commercial diets for 2 wk. (A) No layers of bacteria were observed on the stomach surface of mice fed the purified diet. Bar = 1 μm. (B) Dense layers of gram-positive bacteria were seen on the forestomach surface of mice fed the commercial diet; bar = 1 μm. (C) Higher magnification of (B): bar = 10 μm. Numerous gram-positive rods were present in the bacterial layer.http://jn.nutrition.org/content/135/1/109/F4.expansionhttp://jn.nutrition.org/content/135/1/109/F4.expansion