Viral (Aseptic) Meningitis
What is meningitis?
Meningitis is an illness in which there is
inflammation of the tissues that cover the brain and
spinal cord. Viral or aseptic meningitis, which is the
most common type, is caused by an infection with one of
several types of viruses. Meningitis can also be caused
by infections with several types of bacteria or fungi.
What are the symptoms of meningitis?
The symptoms of meningitis may not be the same for
every person. The more common symptoms are fever, severe
headache, stiff neck, bright lights hurt the eyes,
drowsiness or confusion, and nausea and vomiting. In
babies, the symptoms are more difficult to identify.
They may include fever, fretfulness or irritability,
difficulty in awakening the baby, or the baby refuses to
eat.
Is viral meningitis a serious disease?
Viral (aseptic) meningitis is serious but rarely
fatal in persons with normal immune systems. Usually,
the symptoms last from 7 to 10 days and the person
recovers completely. Bacterial meningitis, on the other
hand, can be very serious and result in disability or
death if not treated promptly. Often, the symptoms of
viral meningitis and bacterial meningitis are the same.
For this reason, if you think you or your child has
meningitis, see your doctor as soon as possible.
What causes viral meningitis?
Many different viruses can cause meningitis. About
90% of cases of viral meningitis are caused by members
of a group of viruses known as enteroviruses, such as
coxsackieviruses and echoviruses. Herpesviruses and the
mumps virus can also cause aseptic meningitis.
How is viral meningitis diagnosed?
Viral meningitis is usually diagnosed by laboratory
tests of spinal fluid obtained with a spinal tap. It can
also be diagnosed by tests that identify the virus in
specimens collected from the patient, but these tests
are not usually done.
How is viral meningitis treated?
No specific treatment for viral meningitis exists at
this time. Most patients recover completely on their
own, and doctors often will recommend bed rest, plenty
of fluids, and medicine to relieve fever and headache.Can
I get viral meningitis if I'm around someone who has it?
The viruses that cause viral meningitis are
contagious. Enteroviruses, for example, are very common
during the summer and early fall, and many people are
exposed to them. However, most infected persons either
have no symptoms or develop only a cold or rash with
low-grade fever. Typically, fewer than 1 of every 1000
persons infected actually develop meningitis. Therefore,
if you are around someone who has viral meningitis, you
have a moderate chance of becoming infected, but a very
small chance of developing meningitis.
How is the virus spread?
Enteroviruses, the most common cause of viral
meningitis, are most often spread through direct contact
with respiratory secretions (e.g., saliva, sputum, or
nasal mucus). This usually happens by shaking hands with
an infected person or touching something they have
handled, and then rubbing your own nose, mouth or eyes.
The virus can also be found in the stool of persons who
are infected. The virus is spread through this route
mainly among small children who are not yet toilet
trained. It can also be spread this way to adults
changing the diapers of an infected infant. The
incubation period is usually between 3 and 7 days from
the time you are infected until you develop symptoms.
You can usually spread the virus to someone else
beginning about 3 days after you are infected until
about 10 days after you develop symptoms.
How can I reduce my chances of becoming infected?
Because most persons who are infected with
enteroviruses do not become sick, it can be difficult to
prevent the spread of the virus. If you are in contact
with someone who has viral meningitis, however, the most
effective method of prevention is to wash your hands
thoroughly and often. In institutional settings such as
child care centers, washing objects and surfaces with a
dilute bleach solution (made by mixing 1 capful of
household bleach with 1 gallon water) can be a very
effective way to inactivate the virus.
Information provided by the
Centers for Disease Control and Prevention
Article Created: 1999-05-16
Article Updated: 1999-05-16
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