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Age, median (range) 55 (24–74) Sex 4 male, 3 female Days since symptoms onset, mean (range) 3.5 (1–7) Headache 100% Nausea and vomiting 83% Photophobia 66% Chills 66% Malaise 66% Fever 50% Mental status changes 33% Test Range (Median) Reference Ranges CSF Leukocyte count 17–497 (141) 0–5 Protein 50–154 (73) 15–50 Glucose 51–120 (62) 50–80 Differential ≥50% neutrophils (n = 6 of 7) 6–100% (74) All mononuclear cells Blood Range (Mean) Leukocyte count 5.7–19.2 (10.5) 4.5–11 Hyponatremia, serum <135 mmol/L (n = 6 of 7) 122–134 (132) 135–145
