Figure 1. Evolution of peripheral blood parasite and lymphocyte counts in C57BL/6 mice inoculated with T. evansi.

A: parasite and lymphocyte counts in a representative C57Bl/6 mouse over a 30-day period after T. evansi inoculation. Synchrony between successive parasite peaks and lymphocyte troughs is clear. B: enlarged view of the time window during which lymphocyte death was sought in vivo.