The nurse is caring for an adult male diagnosed with a peptic ulcer. The nurse states that the most likely causative agent is:
1. Cryptococcus.
2. Pneumocystis carinii.
3. Helicobacter pylori.
4. Mycobacterium avium.
Correct Answer: 3
Rationale 1: Cryptococcus is not associated with the development of peptic ulcers.
Rationale 2: Pneumocystis carinii is not associated with the development of peptic ulcers.
Rationale 3: Helicobacter pylori is associated with 70% of peptic ulcers.
Rationale 4: Mycobacterium avium is not associated with the development of peptic ulcers.
Global Rationale: Helicobacter pylori is associated with 70% of peptic ulcers. The remaining bacteria have no relationship to the disease.
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