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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