The brain and spinal cord are surrounded by layers of tissue. These layers are called the meninges. When these layers becomes swollen and irritated it is called meningitis. The swelling in these layers can put pressure on the brain and spinal cord. The most common forms of meningitis include: Viral meningitisAseptic meningitis
—caused by a variety of medical conditions except bacteria
—generally the most serious infection
The Spinal Cord and Meninges
Copyright © Nucleus Medical Media, Inc.
Viral meningitis is caused by a virus such as: EnterovirusesHerpes
Varicella virus (
West Nile virus
Viruses can be spread in numerous ways including:
Contact with fluids from cough or sneeze of an infected personContact with feces from infected personClose personal contact with someone who is sickThrough insect bites
Factors that increase your risk of viral meningitis include:
Conditions that weaken the immune system, such as
HIV infectionImmunosuppressive treatmentsCrowded, unsanitary conditionsSeason: summer and early fall
Symptoms of viral meningitis include: High feverHeadacheStiff, sore neckNauseaVomitingSensitivity to bright lightsSleepiness
Symptoms in newborns and infants include: InactivityHigh fever (especially unexplained high fever)IrritabilityVomitingFeeding poorly or refusing to eatTautness or bulging of soft spots between skull bonesDifficulty awakening
The doctor will ask about your symptoms and medical history. A physical exam will be done. The doctor will focus on the nervous system. To help rule out other causes of the inflammation, such as a tumor, your doctor may need pictures of the brain, spine, and skull. These pictures can be created with:
MRI scanCT scan
Viral meningitis has similar symptoms as bacterial meningitis.
To make sure you do not have bacterial meningitis, the following tests may be done:
Lumbar puncture (spinal tap)
—to look for bacteria in spinal fluid
Tests of blood, urine, mucus, and/or pus from skin infections to look for bacteria
Treatment includes: Rest and fluidsNonsteroidal anti-inflammatory drugsAspirin Note
: Aspirin is not recommended for children with a current or recent viral infection
Check with your doctor before giving a child aspirin
Antibiotics—may be given for 2-3 days while the doctor wait for test results about bacterial infection, antibiotics are note effective for viral infectionIV antiviral drugs—for severe infections
If you are diagnosed with viral meningitis, follow your doctor's
You can not control where a virus goes once it is in your body. However, you can take steps to prevent viral infections: Wash your hands
often. This is even more important:
If you are in close contact with an infected personImmediately after changing the diaper of an infected infantRegularly wash objects and surfaces touched by children. Use a diluted bleach solution.Ask your doctor about appropriate vaccinations. Especially important
if you've never had measles, mumps, rubella, and chickenpox.
To prevent infections spread by mosquito bites:
Follow public health recommendations for reducing mosquitoes near your home.Take steps to avoid being bitten by mosquitoes. Use insect repellant and appropriate clothing when outdoors.Avoid areas or being outside when mosquitoes are prevalent.
If you are contemplating a pregnancy:
Be sure you are protected from common diseases like chickenpox. Ask your doctor about recommended vaccinations.Avoid all contact with rodents during pregnancy.
The Merck Manual of Medical Information
. 18th ed. Whitehouse Station, NJ: Merck; 2006.
Last reviewed November 2012 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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