Microbiology A patient is found to have a duodenal ulcer by upper endoscopy. The likelihood of this patient having H. pylori in the gastric antrum is? A 5% B 20% C 60% D 95% 💡 Explanation A patient is found to have a duodenal ulcer by upper endoscopy. The likelihood of this patient having H. pylori in the gastric antrum is? ✓ Correct Answer: C. 60%