Bacterial translocation experiments from Wistar rats challenged by the regional basic northeast diet (RBD) and following lactose administration. The RBD was given ad libitum for 14 days and lactose (30 g/Kg, by gavage) was administered after the 8th day of the experiment. Values are expressed in aerobic colony-forming units (CFU) per milligram of the spleen tissue. Statistical analyses were done using Mann-Whitney or Kruskal-Wallis followed by Dunns’ correction. Groups: nourished control, undernourished control (UN), undernourished control supplemented with zinc (UN + Zn), undernourished control challenged by lactose (UN + Lac), and lactose-challenged undernourished rats supplemented with zinc (UN + Zn + Lac).