A 49 year old man presents with chronic epigastric pain that improves with meals but recurs several hours later. He has no weight loss or vomiting. Endoscopy shows a duodenal ulcer. Gastric biopsy demonstrates curved gram negative rods. Which of the following properties is most important for this organism’s survival in the stomach?
- A)Expression of protein A
- B)Capsular polysaccharide
- C)Ability to ferment lactose
- D)Endospore formation
- E)Urease productionGABARITO
Explicação
Urease production is correct. Helicobacter pylori generates ammonia from urea, which buffers gastric acid and helps the organism colonize the mucous layer overlying gastric epithelium. The curved gram negative rods and duodenal ulcer pattern are classic for H ... Ver explicação completa e trilha adaptativa →