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14th June 2023
An 18-year-old male presented with a 2-day history of fever, headache, irritability, and diffuse maculopapular rash
An 18-year-old male presented with a 2-day history of fever, headache, irritability, and diffuse maculopapular rash. He also reported a 4-day history of flu-like illness, including cough, myalgia and arthralgias. On assessment, he was febrile at 37.9. Other vital parameters were within normal limits. The rash was non-blanching. GCS 15/15. No focal neurology was present. Bloods showed leucocytosis.
CSF analysis:
| Appearance | Cloudy | |
| Protein | 0.55 g/L | (<0.45 g/L) |
| Glucose | 2.6 mmol/L | (2.5-4.4 mmol/L) |
| White cells | 300 cells/μL (predominantly polymorphs) | (<5 cells/μL) |
Of the options below, which single answer is the most likely underlying diagnosis?
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