A 48-year-old woman presents to the Emergency Department with a fever, sweats and malaise. | Medibuddy
27th June 2023

A 48-year-old woman presents to the Emergency Department with a fever, sweats and malaise.

A 48-year-old woman presents to the Emergency Department with a fever, sweats and malaise. Past medical history includes eczema and rheumatoid arthritis, which is well controlled on methotrexate. She had a urinary tract infection a month ago, which was treated with a course of antibiotics, although she can’t remember the name.

Blood tests today show:

Hb 70 g/L (115-155 g/L)
WBC 2.0 x 10⁹/L (4.0-11.0 x 10⁹/L)
Platelets 68 x 10⁹/L (150-500 x 10⁹/L)
Neutrophils 0.2 x 10⁹/L (2.5-7.58 x 10⁹/L)

Which of the following is the most likely cause of this presentation?

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