LCN2 and infection: Furthermore, no significant differences were observed in the reduction in bacterial shedding, PMN infiltration in the cecum lamina propria, and lipocalin-2 levels in the stools when CAA1 SIgA2 was provided 2 h before infection or when it was premixed with C. jejuni 81-176 before oral administration to the animals (Supplemental Figures 5E–G).