Research indicates that memory TCD4+ and TCD8+ (CD45RA-) lymphocytes from chagasic cardiomyopathy subjects who synthesize IFN-γ show significant CD127-CD132+ expression (IL-7Rα and IL-7 γc receptors, respectively) compared to chagasic cardiomyopathy subjects whose T cells do not synthesize IFN-γ and uninfected individuals. The gene discussed is IL2RG; the disease is cardiomyopathy.