IL17A and Salmonella Infections: Further, there is no research regarding CNP effects in IL-17 cells or Th17 cytokines in chickens challenged with Salmonella. According to literature, Th17 cells and Th17 cytokines play an important role in the resistance to mucosal Salmonella infections across different species (Raffatellu M, George MD, Akiyama Y, 2009; Griffin and McSorley, 2011), including chickens (Crhanova et al., 2011).