Neutrophil count in cerebrospinal fluid (CSF) via quantitative turbidimetric assay

Why This Test Is Done

Your doctor may order this test if you have symptoms like severe headaches, neck stiffness, fever, confusion, or neurological problems. It’s often used to diagnose conditions such as meningitis, brain infections, or other inflammatory diseases in the central nervous system.

What to Expect During the Test

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). You’ll lie on your side, and a needle is gently inserted into your lower back to draw the fluid. The process is usually quick and may cause mild discomfort.

How the Results Are Interpreted

Elevated neutrophil counts in CSF often indicate an infection (e.g., bacterial meningitis) or severe inflammation. Lower-than-expected counts may suggest conditions like multiple sclerosis or other non-infectious causes. Your doctor will review the results in the context of your symptoms and medical history.

Common Conditions This Test Helps Diagnose

This test is critical for diagnosing infections like bacterial meningitis, abscesses in the brain or spinal cord, or conditions causing inflammation (e.g., acute disseminated encephalomyelitis). It can also help rule out other neurological disorders.