A 35-year-old male presents to the emergency department with intense back pain. He is hydrated and given pain medication. After several hours, he passes a kidney stone. Laboratory analysis of the stone reveals that it is composed of struvite (magnesium ammonium phosphate). Infection with which of the following organisms promotes the production of such stones?

1. A)Escherichia coli
2. B)Ureaplasma urealyticum
3. C)Staphylococcus saprophyticus
4. D)Pseudomonas aeruginosa
5. E)Proteus mirabilisGABARITO