Bacterial translocation and gut histopathology. (A) Number of colonies from mesenteric lymph nodes at day 13 after allogeneic transplantation. Lymph nodes were harvested from 4 mice receiving allogeneic transplants, homogenized, and plated on solid bacteria growth media. Number of colonies were counted after 24 hours (^*P = .07, control versus L rhamnosus GG, Mann-Whitney test). (B) Histopathology score of terminal ileum at day 22 after allogeneic transplantation. Animals receiving antibiotics (4 animals per group) (^*P < .04, Mann-Whitney test) or L rhamnosus GG (^*P < .1, Mann-Whitney test) displayed reduction in histopathology when compared with animals receiving autoclaved drinking water only.