<prompt> A urinary tract infection as a result of Proteus mirabilis facilitates the formation of kidney stones because the organism:Destroys blood vessels in the kidneyExhibits swarming motilityFerments many sugarsProduces a potent urease  <response>: 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. 