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Mean log10 CFU/gram of tissue obtained at endoscopy 4 weeks after challenge (A) and at necropsy 11 weeks after challenge (B) with H. pylori. Results for each animal are averaged for six samples at endoscopy and for 11 samples at necropsy. Means for animals that received sham vaccination (control), oral urease (PO), and parenteral urease vaccination (IM) are shown as bars.
