It has been reported that IL-17 and its associated cytokines (IL-21 and IL-22) are induced in the gastrointestinal tract during Salmonella infection (Ramarathinam et al., 1993; Lee et al., 2012; Kurtz et al., 2014; McSorley, 2014). The gene discussed is IL21; the disease is Salmonella Infections.