Figure 6 - Small intestine morphometry of germfree and L. acidophilus UFV-H2b20-monoassociated mice. After 7 days of monoassociation, mice were sacrificed and the small intestine was collected in phosphate-buffered formalin. Each bar represents one animal. Villus height was significantly smaller in monoassociated animals (Student t-test, P = 0.013). Crypt depth was also significantly smaller in monoassociated mice (Student t-test, P = 0.03).