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Illustration of Helicobacter pylori rat inoculation. A: Male Sprague-Dawley rats 120-150 g; B: Pretreatment with streptomycin (5 mg/kg) for three consecutive days; C and D: H. pylori in microaerophilic condition: 5% O2, 50% CO2, 37 °C; E and F: H. pylori 108-1010 CFU/mL, suspended in saline; G: Gavage, 1 mL/rat twice daily at an interval of 4 h, for three consecutive days. H. pylori: Helicobacter pylori.
