Figure 3

Density of CD163 positive macrophages in pigs 14 and 42 days post challenge. Comparison of the density of CD163 positive macrophages in the lamina propria of pig ileum infected with L. intracellularis 14 and 42 days post challenge (dpc). The colour gradations (*) denote the infection burden, measured using qPCR, as number of L. intracellularis 16S rRNA copies per nanogram of total genomic DNA.