Table 1.

Initial Laboratory Values

Initial Lab Investigations	Case 1	Case 2
White blood cell count (ref range, 4.5–11.0 K/μL), K/μL	15.51	15.44
% neutrophils	91.7	87.6
Hematocrit (ref range, 41.0–53.0%), %	35.8	22.5
Platelets (ref range, 150–400 K/μL), K/μL	389	403
Serum sodium (ref range, 136–145 mmol/L), mmol/L	133	140
Serum bicarbonate (ref range, 20–31 mmol/L), mmol/L	26	10
Serum creatinine (ref range, 0.50–1.30 mg/dL), mg/dL	0.60	15.04
Venous pH (ref range, 7.32–7.42)	N/A	7.14
HIV 1/2 Ab/Ag	Negative	Negative
CSF RBC count (ref range, 0–5 /μL), /μL	4	61
CSF WBC count and differential (ref range, 0–5/μL), /μL	83 (31% PMNs, 47% lymphs)	1 (61% lymphs)
CSF glucose (ref range, 50–75 mg/dL), mg/dL	50	71
CSF protein (ref range, 5–55 mg/dL), mg/dL	81	30
CSF HSV 1/2 PCR	Negative	Negative
CSF VZV PCR	Negative	Negative
CSF adenovirus PCR	Negative	Negative
CSF enterovirus PCR	Negative	Negative
CSF culture	Negative	Negative

Abbreviations: Ab, antibody; Ag, antigen; CSF, cerebrospinal fluid; HIV, human immunodeficiency virus; HSV, herpes simplex virus; PCR, polymerase chain reaction; RBC, red blood cell; WBC, white blood cell; VZV, varicella zoster virus.