Let's learn more about Meningoencephalitis, which affects both your brain and the covering of your brain.

The brain is one of the most important organs in our body. So what if the brain gets sick? Just imagine how serious it can be. Today we are going to talk about a disease like that, which is a little serious, but if you know exactly what to do, you can take action quickly. This is called meningoencephalitis . Sometimes doctors also call it encephalomeningitis.

So what is meningoencephalitis?

Simply put, meningoencephalitis is a rare but potentially life-threatening condition in which you develop both meningitis and encephalitis at the same time.

Now let's look at what meningitis and encephalitis are separately.

• Meningitis is an infection and swelling of the protective membranes (called the meninges) that surround your brain and spinal cord (the nerve cord inside your spine). These meninges protect and support your brain and spinal cord from injury.
• Encephalitis is a swelling or infection within the brain tissue.

So, when these two conditions come together, meningoencephalitis occurs. This is a serious condition that can affect anyone of any age, even very young babies .

What are the main causes of meningoencephalitis?

There are several types of meningoencephalitis depending on the cause of the disease. But most often it is caused by an infection. That is, infections caused by viruses, bacteria, fungi, or amoeba. Sometimes it can be caused by autoimmune diseases, for example, autoimmune encephalitis or meningoencephalitis, or as a side effect of certain medications (such as immune checkpoint inhibitor therapy).

Let's look at some of the most common types of infections:

• Bacterial meningoencephalitis: This is caused by a bacterial infection. The most common types of bacteria that cause this are Neisseria meningitidis (also called meningococcal disease), Streptococcus pneumoniae, and Haemophilus influenzae type b.
• Cryptococcal meningoencephalitis: This is a fungal infection. It occurs when a type of fungus called Cryptococcus infects your brain and/or lungs.
• Herpetic meningoencephalitis (HME): This can be caused by infection with the herpes virus. It is most often caused by herpes simplex virus type 1 (HSV1) – the virus that causes cold sores. However, it can also be caused by herpes simplex virus type 2 (HSV2). Sometimes meningoencephalitis occurs during an initial infection, but more often it is caused by a reactivation of the virus from a previous infection.
• Primary amebic meningoencephalitis (PAM): This is caused by an amoeba called Naegleria fowleri. This amoeba lives all over the world, especially in shallow, warm freshwater bodies like lakes, rivers, and hot springs. Some people call it the "brain-eating amoeba," and it is just as dangerous.

What are the symptoms of meningoencephalitis?

The symptoms of this disease usually appear very quickly and can quickly become severe. Therefore, it is very important to be aware of these symptoms.

Common symptoms:

• Severe headache.
• Neck stiffness or neck pain.
• Fever.
• Extreme fatigue.
• Nausea and vomiting.
• Muscle weakness.
• Difficulty speaking.
• Sensitivity to light, meaning difficulty looking at light (photophobia).
• Difficulty thinking clearly.
• Changes in personality and behavior.
• Hallucinations – especially visual and/or auditory hallucinations, such as seeing things that are not there or hearing things that are not there.
• Seizures.
• Unconsciousness.

If a young baby develops this disease, they may also show these additional symptoms:

• Protrusion of the forehead (like a swelling).
• Difficulty drinking milk.
• Excessive sleepiness or difficulty waking up.

The most important thing is to seek medical advice immediately if you or your child has one or more of these symptoms. Meningoencephalitis is a life-threatening disease, so prompt treatment is essential!

Is meningoencephalitis contagious?

Meningoencephalitis, an inflammation of the brain and meninges , is not directly contagious. However, some of the infections that cause it can be. For example, many of the bacteria and viruses (such as herpes simplex virus) that cause meningoencephalitis can spread from one person to another.

Who is at higher risk of developing this disease?

People with weakened immune systems are generally at higher risk of developing meningoencephalitis caused by infections.

Conditions and factors that weaken the immune system:

• Age: Children under 5 years of age and people over 65 years of age usually have a weaker immune system. Infants are especially at risk of developing this disease.
• HIV (human immunodeficiency virus) infection: For example, cryptococcal meningoencephalitis often affects people with severe HIV.
• Taking immunosuppressants: For people who have had an organ transplant, stem cell transplant, or are taking these medications for certain autoimmune diseases.
• Cancer and cancer treatments: such as chemotherapy and radiation therapy.
• Primary immunodeficiency disorder (PIDD)
• Some autoimmune diseases: Examples include psoriasis, Crohn's disease, and lupus.
• Alcohol use disorder.

If you think your immune system is weak, talk to your doctor about ways to stay healthy and avoid serious infections.

How is Meningoencephalitis diagnosed?

If you or your child has symptoms of meningoencephalitis, doctors will work quickly to confirm the diagnosis. They will do a physical exam and neurological exams. They will also ask you about your symptoms, such as how and when they started.

Here are some tests that are done to confirm the disease:

• Body fluid tests: Various body fluids, such as urine, blood, and saliva, are tested to look for signs of infection (such as an increased white blood cell count). These tests can also identify the type of infection.
• Spinal tap (lumbar puncture): In this test, your doctor inserts a thin needle into your lower back and takes a sample of cerebrospinal fluid (CSF). The fluid is tested in a lab to look for bacteria, fungi, or abnormal cells, as well as the types and levels of proteins and white blood cells. This CSF test is often used to differentiate meningoencephalitis from other conditions, such as blood toxicity or sepsis.
• EEG (electroencephalogram) test: An EEG measures and records the electrical signals in your brain. Doctors use it to look for problems with brain function to diagnose or assess meningoencephalitis.
• CT scan: A CT scan is a test that uses a series of X-rays and a computer to make detailed pictures of the inside of your body. It can show problems such as blood clots, swelling, and infection in the brain or meninges.
• MRI (magnetic resonance imaging): An MRI scan is a test that uses a large magnet, radio waves, and a computer to take detailed pictures. Like a CT scan, it can show problems in the brain or meninges. MRI is best for young children because it does not use radiation.

How is meningoencephalitis treated?

Treatment for this condition varies depending on the cause and severity of the condition. In most cases, hospitalization is required for treatment.

Several treatment methods:

• Medications to treat the underlying infection: For example, antifungal medications are needed for cryptococcal meningoencephalitis. Antiviral medications, such as acyclovir, are used for herpetic meningoencephalitis.
• Antiseizure medications: Medications such as dilantin or phenytoin are given to prevent or treat seizures caused by meningoencephalitis.
• Corticosteroids and diuretics: Corticosteroids, such as Decadron, can help reduce swelling. They can also help prevent hearing loss that can occur with meningoencephalitis.
• Cerebrospinal fluid drainage: This also helps reduce pressure inside the skull.
• Painkillers and/or sedatives: These medications may be used in cases of severe swelling.

The medical team will monitor you closely during your stay in the hospital. They will take the necessary steps for any problems or complications you may have.

What is the recovery rate for someone with meningoencephalitis?

The prognosis for recovery from this disease depends on the cause of the disease, its severity, and how quickly treatment is received.

Of those who survive cryptococcal meningoencephalitis, approximately 69% have cognitive (thinking) and/or physical impairments 12 months after diagnosis. Between 50% and 70% of those who develop herpetic meningoencephalitis may develop permanent brain damage, neurological deficits, or coma.

However, those whose disease is not as severe and who receive treatment early are more likely to have fewer complications.

Can Meningoencephalitis be prevented?

Not all cases of meningoencephalitis can be prevented. However, the best way to reduce your risk is to try to stay healthy and stay away from bacteria, viruses, and fungi that cause infections.

Here are some ways you can protect yourself and others from infection:

• Always wash your hands thoroughly with soap.
• Cover your mouth and nose when coughing or sneezing.
• Clean frequently touched surfaces (like doorknobs, table tops) with disinfectant.
• Reduce or completely stop socializing with people who are sick with a contagious illness, whether you or someone else is sick.
• Avoid bathing or drinking water that may contain germs. If you use nasal irrigation, use distilled or purified water.
• Use condoms to protect yourself from sexually transmitted infections (STIs) and get tested for STIs regularly.
• Wear a mask in dusty areas, such as construction sites, and stay indoors during dust storms. If you live in an area where fungal infections are common, take extra precautions.
• Always consult a doctor for advice, especially if your immune system is weak (immunocompromised).
• If you are traveling to other countries, learn how to protect yourself from infectious diseases that are common in those countries.

Finally, things to remember

Meningoencephalitis is a very serious, life-threatening illness. If you or your child have any of these symptoms, seek medical attention immediately. Early treatment is the best chance for a good outcome. If you are at high risk of developing the infection, talk to your doctor about how to reduce your risk and stay healthy. We hope this information is helpful to you. Stay healthy!

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