This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'A urinary tract infection as a result of Proteus mirabilis facilitates the formation of kidney stones because the organism: \nSelect and explain. \nA. Destroys blood vessels in the kidney, B. Exhibits "swarming" motility, C. Ferments many sugars, D. Produces a potent urease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Proteus mirabilis facilitates the formation of kidney stones because the organism produces a potent urease. Proteus: Causes 1-2% of cases of UTI in healthy women. 5% of cases of hospital-acquired UTI. High prevalence of stones is due to bacterial production of urease (Hydrolyzes urea -ammonia - alkalization of the urine-precipitation of struvite and carbonate-apatite crystals- development of calculi). Option 1: Destruction of blood vessels in the kidney is seen in HUS (Haemolytic uremic syndrome) caused by Enteroheamorrhagic Escherichia coli (EHEC). Option 2: Swarming is the propey of Proteus but not associated with stone formation. Option 3: Proteus is lactose non fermenter ie. does not ferment lactose (sugar).', 'role': 'assistant'}]