CCL28 and Salmonella Infections: However, it is still possible that CCL28 modulates B and T cell responses in chronic model of Salmonella infection, which could be explored in future studies using attenuated Salmonella strains (Hapfelmeier et al., 2005), or mice genetically more resistant to Salmonella because they express a functional Nramp1 (Monack et al., 2004).