Scores for immune cells, apoptotic cells and parietal cells in bambermycin supplemented and non-supplemented groups. Scores for infiltration with inflammatory cells (A) and lymphoid follicle formation (B); number of infiltrating B-cells (C), T-cells (D), macrophages (E); number of apoptotic cells (F) and parietal cells (G) in bambermycin supplemented and non-supplemented groups. A, B Data are shown as the average scores for infiltration with inflammatory cells/lymphoid follicle formation, with standard deviation, of group 1–6. C–G Data are shown as the average number of positive cells per high power field (HPF), with standard deviation, belonging to a defined cell population, including B-cells, T-cells, macrophages, necrotic cells and parietal cells, of group 1–6. Statistical differences were calculated using the non-parametric Kruskal–Wallis H test SPSS statistics 24®. *Significant differences between the groups (P < 0.05), **significant differences between the groups (P < 0.005). Group 1 = H. suis-negative control group without bambermycin supplementation; group 2 = 32 ppm bambermycin supplemented, non-H. suis infected group; group 3 = 64 ppm bambermycin supplemented, non-H. suis infected group; group 4 = H. suis-positive control group without bambermycin supplementation; group 5 = 32 ppm bambermycin supplemented, H. suis infected group; group 6 = 64 ppm bambermycin supplemented, H. suis infected group.