]> 2026-07-31T14:08:20+00:00 WBR0382 0 en Oxidase-positive, catalase-positive, urease-positive ''Proteus mirabilis'' is oxidase-negative. Oxidase-negative, catalase-negative, urease-positive ''Proteus mirabilis'' is catalase-positive. Oxidase-positive, catalase-negative, urease-negative ''Proteus mirabilis'' is oxidase-negative, catalase-positive, and urease-positive. Oxidase-negative, catalase-positive, urease-positive ''Proteus mirabilis'' is correctly an oxidase-negative, catalase-positive, urease-positive, gram-negative rod. Oxidase-positive, catalase-positive, urease-negative ''Proteus mirabilis'' is oxidase-negative and urease-positive. ''Proteus mirabilis'' is the most common causative agent of struvite stones. It is an oxidase-negative, catalase-positive, urease-positive, gram-negative rod that has a characteristic “swarming” motility in cultures. ''Proteus mirabilis'' is a known pathogen of the urogenital tract. Other examples of urea-splitting organisms are ''Pseudomonas'', ''Klebsiella'', ''Staphylococcus'', and ''Mycoplasma''.<br/> '''Educational Objective:''' ''Proteus mirabilis'' is a common causative agent of struvite stones. It is an oxidase-negative, catalase-positive, urease-positive, gram-negative rod with characteristic “swarming” motility in culture.<br/> '''References:''' First Aid 2014 page 173 Microbiology A 38-year-old man presents to the emergency department with complaints of fever and back pain that radiates to the inguinal area. His temperature of 38.5 °C (101.3 °F), heart rate is 98/min, and blood pressure is 122/88 mmHg. Following appropriate work-up, the patient is diagnosed with struvite kidney stone. Urine cultures demonstrate a urea-splitting organism with swarming motility. Which of the following characteristics most likely correspond to the organism responsible for this patient's symptoms? D Genitourinary 2020-10-28T00:24:11Z 2459150.516794 WBR0382