Furthermore, also the only mouse of the isotype-treated CD4+IFNγ-/- T cell recipient group that died upon infection on day 16 had only very low amounts of bacteria predominantly in the liver (52.0 copies) followed by the brain (20.8 copies), lung (6.49 copies) and spleen (1.01 copies) (Fig 9C). The gene discussed is CD4; the disease is infection.