Jacob, a 42-year-old, complains of severe stomach pain and unintentional weight loss. He has nausea and sometimes vomits undigested food. A urea breath test is positive. The nurse suspects that the patient may be suffering from which of the following?

A. H. Pylori Infection: A positive urea breath test indicates the presence of Helicobacter pylori, a major cause of peptic ulcer disease and gastric discomfort. B. Diarrhea: No diarrhea is mentioned; symptoms suggest upper GI involvement, not lower. C. GERD: GERD causes heartburn, not weight loss or undigested vomiting. It is not diagnosed with a urea breath test. D. Metabolic alkalosis: This may occur secondary to vomiting, but it’s not the primary diagnosis here.