Foxp3 expression in the canine healthy GALT. In canine Peyer's patches, Foxp3-positive cells were numerously present in interfollicular areas and lower amounts were visible in dome areas. Only few cells were located at the margin of B cell follicles (A: jejunum, dog no. 10, bar: 200 μm). Regarding the small intestinal lamina propria, Foxp3-expressing lymphocytes were more numerous in the villus compared to crypts (B: ileum, dog no. 8, bar: 200 μm, inset bar: 50 μm).