CXCR3 and infection: Parasitemia was still significantly higher in CXCR3−/− than WT mice on day 11 p.i., but decreased to levels similar to WT mice by day 12 p.i. WT as well as CXCR3−/− mice cleared the infection by 3 weeks p.i. On day 10 p.i. when parasitemia peaked at high levels, 10% (1/10) of infected CXCR3−/− mice succumbed to infection (Figure 5B).