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(A) Fundic gastric mucosa from a C57BL/6 mouse infected with H. pylori strain M6ΔureB(cag15-ureB) and killed 8 weeks after inoculation. Mild gastritis characterized by mixed lymphocytes and neutrophils with a few plasma cells is present at the base of the gastric glands. (B) Uninfected control mouse. No inflammatory cells are present.
