MS-2459

MS-2459

A 32-year-old woman presents to the medical unit with fevers, rigors, and night sweats. She has been experiencing increased fatigue and nausea for the past 72 hours before developing fevers.

Upon examination, she appears lethargic and diaphoretic.

Initial vital signs are as follows:

Temperature 39ºC
Blood pressure 90/60 mmHg
Heart rate 120 beats per minute
Respiratory rate 22 breaths per minute
Oxygen saturations 97% on room air

The medical team initiates empirical antibiotic therapy and intravenous fluids while performing an infection screen and blood cultures.

After 48 hours, the patient’s condition has improved. The provisional report from the blood cultures indicates the growth of gram-negative bacilli.

What is the most likely organism causing the patient’s infection?