A 2-year-old boy is brought to the physician because of 2‐day history of musky smelling urine, irritability, and decreased appetite. He has a past medical history of a congenital ureteral stricture. He has been treated with antibiotics for recurrent urinary tract infections. in the past 6 months. Vital signs are temperature is 37.8°C (100.04°F), pulse 80 beats/min, and respirations 20/min. Physical examination shows mild suprapubic tenderness. Laboratory studies show gram-negative motile rods which are urease and nitrite test positive.
Which of following laboratory characteristics will most likely also be observed with the causal agent?
- A) Catalase positive, swarming colonies on solid agar
- B) H2S negative, pink mucoviscous colonies on MacConkey agar
- C) Oxidase negative, green iridescent colonies on eosin-methylene blue (EMB) agar
- D) Oxidase negative, no growth on MacConkey agar
- E) Oxidase negative, pink colonies on MacConkey agar
Authors
Brandon Sigamony
Editor
Dr. Ted O'Connell
