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Any time a child is diagnosed with an illness or disorder that affects the brain and/or spine, like encephalitis, it's natural for a parent to feel somewhat fearful. Fortunately, advances in medicine make this rare disease more treatable than ever. And the specialists at the Jane and John Justin Neurosciences Center at Cook Children's are among the best in the country at treating this disease.
Encephalitis is a rare but serious condition that causes inflammation (swelling) of the brain. It is often a rare complication to a very common infection that usually enters the brain in one of two ways, either through blood infections or infections of the nervous system, such as meningitis.
Infection with many different viruses can lead to encephalitis. Even if someone catches a virus that can cause encephalitis, it doesn't mean that person will automatically develop the condition. In fact, very few people who are infected with these viruses actually develop encephalitis.
Some cases of encephalitis are mild and symptoms only last for a short time. However, it is possible to develop a severe case of encephalitis that can be serious and possibly even life threatening. When a person has encephalitis, his or her brain becomes inflamed (inflammation means swelling and irritation).
Encephalitis can affect people of all ages. Both males and females can develop the condition. Though the condition itself is very rare, people who are very young or very old are most at risk. This is due to the fact that their immune systems tend to be weaker. The immune system is the body's natural defense against illnesses and infections.
Encephalitis (pronounced: in-seh-fuh-LYE-tus) is typically caused by three different groups of viruses:
The best way to prevent encephalitis is to avoid getting infected with the viruses or other germs that can cause it. Regular hand washing will help limit the spread of some of these germs. Staying as healthy as possible by eating a balanced diet and getting plenty of rest can help keep your immune system in shape. Immunizations are also an important way to protect people from diseases like chickenpox and measles.
In areas where viruses and other germs are transmitted by insect bites, protect yourself by wearing long sleeves and pants and applying an insect repellent. Also, try to avoid unnecessary outdoor activities at dawn and dusk when mosquitoes are most likely to bite.
Encephalitis may cause fever, headache, poor appetite, loss of energy, or just a general sick feeling. In more severe cases, other symptoms might occur, including:
When encephalitis happens after a common illness like chickenpox, the signs and symptoms of that illness usually come before symptoms of inflammation in the brain. But encephalitis can also appear without warning.
If your child has symptoms of encephalitis, get in touch with your pediatrician right away. If your child becomes confused, hallucinates, experiences loss of vision or sensation in any part of his or her body, call 9-1-1 or go to the emergency room.
To diagnose encephalitis, your doctor may take blood samples and perform a spinal tap (also called a lumbar puncture), a procedure that involves inserting a very thin needle into the lower back to remove some cerebrospinal fluid (CSF) that surrounds the brain and spinal cord. The samples will be sent to a laboratory to be checked for viruses or bacteria.
An MRI or a CT scan might be done to look for inflammation, and your doctor may order an electroencephalogram (EEG), a test that records brain waves and can reveal any abnormalities consistent with encephalitis.
Treatment for encephalitis depends on the virus or other germ that caused it. Teens with mild cases of encephalitis can recover at home as long as they're watched carefully by a parent or other adult in the household. Most cases of encephalitis just run their course and the person gets better without treatment.
Some viruses that cause encephalitis can be treated with medication. For example, acyclovir, an antiviral drug, can help treat encephalitis caused by the herpes simplex virus. In addition, steroid medications can be used to reduce swelling in the brain (these aren't the same as the dangerous performance-enhancing steroids that some athletes use). Because antibiotics are not effective against viruses, they're not used to treat viral encephalitis.
Severe cases of encephalitis require a hospital stay so the patient can be carefully monitored and medical treatment is close at hand if needed. For people who have had severe encephalitis that has affected some of the brain's functions, like seizures, difficulties with muscle coordination, and learning disabilities, your doctor may recommend physical therapy or speech therapy to help with recovery.
If your child has been diagnosed, you probably have lots of questions. We can help. If you would like to schedule an appointment, refer a patient or speak to our staff, please call our offices at 682-885-2500.