Question

A 39-year-old paraplegic man with an indwelling bladder catheter comes to the emergency department complaining of 24 hours of rigors, nausea, and vomiting. His temperature is 38.9 C (102 F). Physical examination shows suprapubic and costovertebral angle tenderness. Urinalysis shows 3+ leukocyte esterase and numerous white blood cells. Urine and blood cultures grow non-lactose-fermenting Gram-negative rods.

Which of the following microbiological characteristics best describes the infecting organism?

Motile and oxidase positive

Comma-shaped and grows well in high pH

Fast lactose fermenter

Nonmotile and a lactose nonfermenter

Requires factors V and X for growth

Answer 1

Here, the right answer is non motile and a lactose non fermenter.

From data provided, the patient is suspecting to have UTI.

In the cinical data provided, it's already informed that the organism is a non lactose fermenting gram negative rods. Hence, from the given option's, fast lactose fermenter can be avoided. Usually hemophilus organism require factor V and X for their growth, but they are not much associated with UTI.Hence that option can also avoided.As per provided clinical data, the organism is in rod shape, hence the option with comma shaped, grow well in High PH can also excluded.