Neutrophil count in cerebrospinal fluid (CSF) by automated cell differential

Why This Test Is Done

Doctors may order this test if you have symptoms like severe headaches, neck stiffness, fever, or neurological issues that suggest an infection or inflammation in the brain or spinal cord. It can also be part of a routine evaluation for conditions like meningitis, encephalitis, or other infections.

What to Expect Before the Test

You’ll likely undergo a lumbar puncture (spinal tap) where a small needle is inserted into your lower back to collect CSF. The procedure is usually quick and done while you’re lying on your side. You may feel a brief pinch, but it’s generally not painful.

What the Test Results Mean

High neutrophil counts in CSF may indicate an infection (such as bacterial meningitis) or inflammation. Low or normal counts could suggest viral infections, autoimmune conditions, or other non-infectious causes. Your doctor will interpret results in the context of your symptoms and overall health.

Common Conditions Monitored

This test helps diagnose or monitor conditions like bacterial meningitis, encephalitis, subarachnoid hemorrhage, or other inflammatory or infectious processes in the central nervous system.