You are asked to interpret a lumbar puncture to guide therapy for a 64-year-old female who was admitted with confusion
You are asked to interpret a lumbar puncture to guide therapy for a 64-year-old female who was admitted with confusion, fever, and headache. She has a past medical history of type 2 diabetes.
| CSF appearance | Clear | |
| Red cells | 19 | (0-10) |
| White cells | 1623 | (0-5) |
| Differential | 89% polymorphonuclear cells | |
| Protein | 1.78 | (0.15-0.45) |
| Glucose | 4.3 (serum 9.7) | (~ >60% of serum) |
Which is the single most likely causative organism?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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