ATP4B and infection: As mentioned above, infection with H. suis strain HS5cLP in mice induced a clear downregulation of Atp4a and Atp4b expression levels in the stomach at 9 weeks and 6 months pi, and such an effect was not observed in the HS5cLPΔggt infected animals, showing that H. suis GGT contributes to alterations in gastric acid secretion by parietal cells.