The conversion to this dormant stage is induced by penicillin (Tamura and Manire, 1968), iron deficiency (Raulston, 1997), amino acid starvation (Allan and Pearce, 1983b), and interferon-gamma (IFN-γ) (Beatty et al., 1994; Wyrick, 2010). The gene discussed is IFNG; the disease is Iron deficiency anemia.