CD4 and infection: Granuloma formation in livers of L. donovani infected mice was assessed at days 15, 30, and 56 post-infection in CD4+ T cell specific IL-4Rα deficient (LckcreIL-4Rα−/lox), wild-type littermate control (IL-4Rα−/lox) and global IL-4Rα−/− BALB/c mice.