To study the production of IL-2 by T cells during the acute T. cruzi infection, spleen cells from uninfected mice (Figure 1, plot A) or infected mice obtained on days 4 (Figure 1, plot B) and 21 (Figure 1, plot C) after infection were cultured for 24 hours in the presence of medium alone (upper charts) or anti-CD3 mAb (lower charts). This evidence concerns the gene IL2 and infection.