S100A8 and infection: For these infections, we used the Hp strain 7.13, which has been previously shown to reproducibly colonize the Mongolian gerbil stomach, is able to deliver CagA into host cells, and whose isogenic ΔcagA mutant exhibits a defect in colonization of the polarized epithelium in vitro, similar to the Hp strain G27-MA [8], [45].