CCR7 and infection: At day 14, before the peak of infection, B6.CCR7-/- mice initially controlled parasite replication in the footpad (Figure 1B), but by day 28 after infection, B6.CCR7-/- mice had an increase in the number of parasites in the footpad as compared to B6.WT mice (161820 ± 75472 [mean ± SEM] and 19346 ± 7621, respectively, p=0.03).