Meningitis - Causes, Symptoms, and Treatment

What Is Meningitis?

It occurs when the meninges, or protective layers that cover your brain and spinal cord, become inflamed. Bacteria, viruses, fungi, and parasites are all possible causes. Sometimes, it can also happen due to non-infectious conditions.

Meningitis can affect anyone, but babies and young children are more vulnerable—especially those with cochlear ear implants, frequent sinus infections, a history of brain surgery, or head injuries.

In simple terms, it is your body’s way of reacting to an infection or irritation around some of its most delicate areas, the brain and spinal cord.

What Are the Signs and Symptoms of Meningitis?

The early-stage symptoms of meningitis resemble those of a common cold or flu. You may experience the following -

• Cold.

• Headache.

• Neck pain.

• Cough.

• Sore throat.

• Tiredness.

• Fever.

• Ear pain or discharge.

• Muscle pain.

Signs and symptoms of meningitis in adults:

• High fever.

• Neck pain and stiffness.

• Severe headache.

• Nausea and vomiting.

• Confusion.

• Concentration problems.

• Sleepiness.

• Difficulty walking.

• Intolerance to bright light and loud noises.

• Loss of appetite.

• Skin rashes.

• Seizures (an unusual electrical activity in the brain).

Meningitis symptoms in infants:

• Jaundice (a yellowish skin tone).

• A temperature that is either extremely high or lower than usual.

• A weak sucking noise.

• Fever.

• Seizures may also occur in infants with meningitis who have a high fever.

• Red or black rashes all over the body.

• The torso is warm, but the hands and feet are freezing.

• Excessive slumber or difficulty waking up.

• Being less active than usual.

• Being more irritable than normal.

• A cry with a high pitch.

• Neck stiffness.

• Meningitis rash on a baby (red or purple spots)

What Are the Types and Causes of Meningitis?

Let us learn about the different types of meningitis and its causes -

1. Bacterial Meningitis:

The most serious type of meningitis, if treatment is delayed, may be life-threatening. It spreads easily from person to person and can sometimes cause lasting complications like hearing loss or brain damage.

It often develops after infections in the lungs, ears, or skin, or sometimes after a head injury or brain surgery. The most common bacteria behind it include:

• Streptococcus pneumoniae.

• Listeria monocytogenes.

• Neisseria meningitidis.

• Haemophilus influenzae.

• Group B streptococcus.

• Gram-negative bacteria.

• Mycobacterium tuberculosis.

2. Viral Meningitis:

This is the most common type and is usually much milder than bacterial meningitis. Many people recover on their own in a week or two. It tends to affect infants and people with weakened immune systems and spreads through close contact, like coughing, sneezing, or touching contaminated surfaces.

Viruses that can cause meningitis include:

• Non-polio enteroviruses.

• Mumps virus.

• Herpes simplex type 2 virus.

• Chickenpox (Varicella-Zoster virus).

• HIV (human immunodeficiency virus).

• Influenza virus.

3. Fungal Meningitis:

This kind of meningitis is uncommon and cannot be transmitted from one individual to another. It is brought on when a fungus from another area of the body enters the bloodstream and infects the spinal cord or cerebrospinal fluid. The following are a few common fungi that cause this:

• Cryptococcus.

• Histoplasma.

• Blastomyces.

• Coccidioides.

• Candida species.

4. Parasitic Meningitis:

This kind of meningitis is caused by parasites that can be found in soil, animal feces, snails, or even raw or undercooked fish and poultry. The most common parasites are:

• Angiostrongylus cantonensis.

• Baylisascaris procyonis.

• Gnathostoma spinigerum.

• Schistosomiasis.

5. Primary Amebic Meningoencephalitis (PAM):

This is an extremely rare but deadly type of meningitis caused by a tiny organism called Naegleria fowleri. People are frequently infected when warm freshwater (such as lakes or hot springs) containing the amoeba enters their nose and travels to the brain.

6. Non-Infectious Meningitis:

Not all meningitis comes from germs. Sometimes, it is caused by other medical conditions or medications. Non-infectious meningitis can happen due to:

• Cancers.

• Drugs like NSAIDs (non-steroidal anti-inflammatory drugs) and some antibiotics.

• Head injury.

• Lupus (autoimmune disease).

• Vasculitis (inflammation of blood vessels).

• Neurosarcoidosis (inflammation of the brain, spinal cord, and nerves).

7. Drug-induced Aseptic Meningitis (DIAM): Certain medications can result in drug-induced aseptic meningitis. The most prevalent medications that cause DIAM are NSAIDs and antibiotics.

8. Chronic Meningitis: It refers to a condition in which meningitis has lasted longer than a month.

9. Acute Meningitis: This, on the other hand, comes on suddenly and can worsen quickly; bacterial meningitis often falls into this category.

Meningitis causes and types in infants and children are as follows -

Meningitis in babies and young children can be caused by many different germs. Let us discuss the common ones:

1. Viral: Common viruses that can cause meningitis include:

1. Non-polio enteroviruses.

2. Influenza viruses are the same virus that causes the flu.

3. Measles and mumps viruses (especially in children who are not vaccinated).

4. Varicella (chickenpox) virus.

5. Herpes simplex virus (HSV):

   1. HSV-1 - Usually causes cold sores, but can sometimes infect the brain.

   2. HSV-2 – It can be passed from mother to baby during birth.

2. Bacterial:

Common bacteria that cause meningitis in infants and children include:

1. Group B Streptococcus (Streptococcus-B) often affects newborns.

2. Listeria monocytogenes can be transmitted from mother to baby before or during birth.

3. Gram-negative bacilli cause infection in newborns, especially premature babies.

3. Fungal:

Fungal meningitis is rare in children. Fungi that can cause this include:

1. Candida

2. Cryptococcus

3. Histoplasma

4. Blastomyces

5. Coccidioides

4. Parasitic:

This type is very uncommon, but it can happen when certain parasites infect the brain or spinal cord. It’s more likely in tropical or rural areas and can sometimes come from contaminated soil, food, or water.

Is Meningitis Contagious?

So, we all have the question: Is meningitis contagious? It depends on the type of meningitis. Not every type of meningitis spreads from person to person.

• Bacterial and viral meningitis are contagious; they can be transmitted by coughing, sneezing, kissing, or sharing utensils and drinks.

• Fungal and parasitic meningitis, on the other hand, are not infectious and cannot be passed from one person to another.

• Sometimes, infection can also come from eating contaminated food, for example, soft cheeses, hot dogs, or undercooked meats that contain Listeria bacteria.

So, some forms of meningitis spread easily through everyday contact, while others are linked more to environmental exposure or food contamination.

How Is Meningitis Diagnosed?

Your doctor uses the following tests to confirm the diagnosis of meningitis -

• Nasal or Throat Swab: A soft swab is gently rubbed inside the nose or throat to collect a sample. This is then tested in the lab to look for viruses or bacteria.

• Lumbar Puncture or Spinal Tap: This is the most important test. The doctor places a small needle in the lower back to collect cerebrospinal fluid (CSF). The fluid is checked for any signs of infection.

• Blood Tests: The doctor takes a small sample of blood from your arm using a syringe. It is then checked in the laboratory for any signs of infection or inflammation.

• Imaging Tests: Imaging tests are done to take pictures of the brain. This helps the doctor see if there is swelling or other problems.

• Stool Sample: Sometimes, especially if a virus is suspected, you may be asked to provide a stool (poop) sample. The lab examines it for germs that could be causing the infection.

What Is the Treatment for Meningitis?

Meningitis medication depends on the cause of the condition. Some of the treatment options are as follows -

• Bacterial Meningitis: This type needs antibiotics. Early treatment can save lives and prevent complications.

• Viral Meningitis: Meningitis caused by viruses, such as influenza and herpesvirus, is treated with antivirals.

• Fungal Meningitis: Antifungal drugs are used to treat fungal meningitis.

Along with these, doctors may also recommend:

• IV (intravenous) fluids to prevent dehydration.

• Corticosteroids (like Dexamethasone or Prednisone) reduce swelling in the brain.

• Pain relievers for headaches and body aches.

• Plenty of rest to help the body recover.

• Fluids and good hydration to support healing.

Meningitis treatment in infants and young children includes the following -

• If your child has viral meningitis, it’s usually caused by viruses like enteroviruses or influenza. The good news is that most children recover on their own within about 10 days with plenty of rest and fluids.

• However, if the infection is from stronger viruses such as chickenpox (varicella) or herpes simplex, your child may need IV (intravenous) antiviral medicines in the hospital to help fight the infection more effectively.

• Bacterial meningitis is more serious and needs urgent IV antibiotics to prevent brain damage or even death. Without quick treatment, it can lead to complications like cerebral palsy, which affects movement and muscle control.

• When it comes to fungal meningitis, treatment takes longer. Your child may need high doses of antifungal medicines, usually given through an IV, for several weeks, depending on the nature of the disease.

Is There a Vaccine Against Meningitis?

Yes, several vaccines can protect you or your child from the most common types of meningitis. Getting vaccinated is one of the best ways to lower the risk of this serious infection. It includes the following -

1. Haemophilus Influenzae Type B (Hib) Vaccine: Helps you safeguard against serious infections like meningitis and pneumonia.

2. Pneumococcal Conjugate Vaccine (PCV13): Helps prevent pneumococcal meningitis and related infections.

3. Pneumococcal Polysaccharide Vaccine (PPSV23): Offers additional protection, especially for adults and high-risk groups.

4. Meningococcal Conjugate Vaccine (Quadrivalent for Groups A, C, W135, and Y): Guards against several common meningococcal strains.

5. BCG (Bacillus Calmette–Guérin) Vaccine: Given in childhood to protect against tubercular meningitis.

What Are the Risk Factors for Meningitis?

Do you know that there are certain factors that increase your risk of contracting meningitis? Yes, having any of these factors will increase your chance of getting meningitis.

• Individuals who have decreased immunity.

• Crowded places like boarding schools, hostels, or daycare centers make it easier for infections to spread.

• Women who are pregnant.

• Children who are younger than five years of age.

• People who work with or around animals

• People who drink too much alcohol have a weak immune system, making infections more likely.

• Severe ear and sinus infections can sometimes spread to the brain’s protective layers.

• Medical procedures in the head or neck areas can raise the risk of meningitis.

What Are the Complications of Meningitis?

Meningitis can be serious, and if left untreated, it can lead to long-term complications. It includes:

• Loss of vision.

• Convulsions.

• Being deaf.

• Loss of memory.

• Joint stiffness, discomfort, and inflammation (arthritis).

• Severe, unilateral headaches are the result of migraines.

• Damage to the brain.

• Gangrene (the tissue may die because of poor blood flow or severe infection).

• Shock (a dangerous condition where the circulatory system fails to supply sufficient blood to tissues).

• In some rare cases, meningitis can return after recovery; this is called recurrent meningitis. It may occur due to immune system issues, skull defects, or ongoing infections that were not fully resolved.

Can Meningitis Be Prevented?

Yes! You can lower your risk of getting meningitis by following a few simple meningitis precautions and hygiene steps. Prevention is mostly about protecting yourself and others from infection.

Here are some helpful prevention tips you can follow:

• Do not smoke, and try to stay away from places where others are smoking.

• Avoid close contact with anyone who has a known infection.

• Take antibiotics as prescribed by your doctor for a bacterial infection; do not skip doses.

• Get vaccinated to protect yourself from the most common types of meningitis-causing bacteria.

• Washing your hands frequently, especially before eating or touching your face, and disinfecting shared surfaces regularly.

• Do not swim in dirty or contaminated water, as it could expose you to harmful germs.

• Drink only clean and safe water to keep yourself protected.

• If you use nasal rinses, make sure you use distilled or sterile water.

• Drink pasteurized milk and eat well-cooked food to avoid infection from bacteria like Listeria.

• Wear a clean mask when you are in crowded or high-risk areas.

• Practice good hygiene wherever you go, especially when traveling.

Vaccines are the best way to protect babies and young children from meningitis:

• MenB Vaccine (Meningococcal Group B Vaccine): Given at eight weeks, again at 16 weeks, and a booster at one year.

• Six-In-One Vaccine: Given at eight, 12, and 16 weeks, protects against multiple infections, including some meningitis types.

• Hib Vaccine (Haemophilus Influenzae Type B): Starts at 2 months and prevents meningitis and pneumonia.

• MenC Vaccine (Meningococcal Group C): Given at 12 months, with a booster during teenage years.

• MMR Vaccine (Measles, Mumps, and Rubella): Protects against measles, mumps, and rubella, given at one year and again between three to five years to prevent viral meningitis.

• Pneumococcal Vaccine (PCV13 and PPSV23): Protects against pneumococcal meningitis, with doses at 12 weeks and one year, and for adults over 65 years.

Conclusion:

Meningitis is an infection of the membranes that protect your brain and spinal cord. It can affect anyone from infants to adults. In babies and young children, meningitis can be hard to detect because the symptoms are often subtle. That’s why early diagnosis and prompt treatment are so important. With quick medical care and the right prevention steps, meningitis can be managed safely, protecting both you and your community. If you experience any symptoms related to this condition, you can consult a lung specialist to get clear guidance on diagnosis and treatment.

Keynote Takeaways:

• Meningitis is a serious infection that causes inflammation of the membranes surrounding your brain and spinal cord.

• Diagnosed using various tests like lumbar puncture, blood tests, imaging tests, and blood samples.

• Early recognition, quick treatment, and proper vaccination can save lives and prevent long-term complications.