IL6 and Salmonella Infections: Salmonella infection in chickens can cause mild enteric inflammation characterized by increased mRNA expression of proinflammatory cytokines including interleukin-6 (IL-6), IL-8, IL-12, LPS-induced tumor necrosis alpha factor (LITAF), and interferon gamma (IFN-γ) (Kaiser et al., 2000; Withanage et al., 2005; Haghighi et al., 2008; Quinteiro-Filho et al., 2010, 2012; Higgins et al., 2011; Setta et al., 2012; Kubota et al., 2013).