Cytomegalovirus (CMV) Viral Culture from Cerebrospinal Fluid (CSF)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like severe headaches, neck stiffness, confusion, seizures, or other neurological issues that could suggest a viral infection in your brain or spinal fluid. It’s also used in certain high-risk groups, such as newborns, immunocompromised individuals, or those with a history of organ transplants.

What to Expect Before the Test

No special preparation is needed. A small amount of spinal fluid is collected through a procedure called a lumbar puncture (spinal tap). You may feel a brief pinch during the procedure, but it’s generally not painful. You’ll lie on your side and may be asked to hold your breath briefly during the sample collection.

What Happens During the Test

The test involves inserting a needle into your lower back to collect spinal fluid. The fluid is then sent to a lab for culturing. The lab will grow the virus in a controlled environment to see if CMV is present. Results can take several days to weeks.

What the Results Mean

If the culture grows CMV, it confirms a CMV infection in your spinal fluid. If no virus is detected, it means there is likely no active infection at the time of testing. Results may also be pending if the virus hasn’t grown yet.