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Health Encyclopedia

Health Encyclopedia

An invaluable resource of health information.

Cerebrospinal fluid culture

A cerebrospinal fluid (CSF) culture is a laboratory test to look for bacteria, fungi, and viruses in the clear fluid that moves in the space surrounding the spinal cord.

  • Alternative Names

    Culture - CSF; Spinal fluid culture; CSF culture

  • How the test is performed

    A sample of CSF is needed. This is usually done with a lumbar puncture. For information on how this procedure is performed, see spinal tap.

    The sample is sent to the laboratory, where it is placed in a special dish (called a culture medium). The laboratory personnel watch to see if bacteria, fungi, or viruses grow in the dish. Growth means there is an infection.

  • How to prepare for the test

    For information on how to prepare for the procedure to obtain the CSF sample, see spinal tap.

  • How the test will feel

    For information on how it will feel to have a sample of CSF fluid removed, see spinal tap.

  • Why the test is performed

    Your doctor may order this test if you have signs of an infection that affects your brain or nervous system. The test will help identify the origin of the infection. This helps your doctor determine the best course of treatment.

  • Normal Values

    A normal result means no bacteria, viruses, or fungi grew in the laboratory dish. This is called a negative result.

  • What abnormal results mean

    An abnormal result means a fungus, virus, or bacterium grew in the laboratory dish. This is considered a positive culture and is a sign of an infectious meningitis. This does not necessarily mean the infection is contagious, unless it is meningococcal meningitis.

    See also:

  • What the risks are

    A laboratory culture poses no risk to the patient. For risks associated with the procedure done to get a CSF sample, see spinal tap.

Review Date: 8/10/2008

Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2014 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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Christie Clinic at the Family Medical Center in Paris
727 East Court Street Paris, IL 61944 Dermatology: 366-1248; Vein and Vascular: 366-2670
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