What Is Meningitis?

Meningitis is a risky inflammation of the meninges, the protective membranes that surround the central keyed taking place system (brain and spinal cord).

Meningitis can manufacture numerous mild symptoms, including fever, nausea, sore, stiff neck, fresh reaction, and skin rash.

In more aggressive cases, it can cause confusion, seizures, deed, brain abnormal, and death.

It's unidentified exactly how many people wrestle from meningitis each year.

However, in 2013 meningitis resulted in 303,500 deaths worldwide, according to a 2014 report in the medical journal The Lancet.

Meningitis isn't the same as encephalitis or myelitis, an inflammation of the brain or spinal cord, respectively (or encephalomyelitis, a simultaneous inflammation of the brain and spinal cord).

Infectious Causes of Meningitis

Most often, the meninges will become inflamed once the shapeless surrounding the central aquiver system is impure.

Viral meningitis is the most common form of the sickness, according to the Centers for Disease Control and Prevention (CDC), and is most often caused by non-polio enteroviruses, such as echnoviruses and coxsackievirus A and B.

Numerous subsidiary viruses may cause it as nimbly, however, including the mumps, measles, HIV, West Nile, and herpes viruses.

Bacterial meningitis is rare, but often aggressive and life threatening.

In the United States, the leading causes of bacterial meningitis are Haemophilus influenzae type b, Streptococcus pneumoniae (called pneumococcus meningitis), organization B Streptococcus, Listeria monocytogenes, and Neisseria meningitidis (meningococcal meningitis).

Unlike viral and bacterial meningitis, fungal meningitis  generally caused by Cryptococcus, Histoplasma, Blastomyces, Coccidioides, or Candida fungi  isn't contagious.

It usually occurs amid fungi travel through the blood to the spinal cord.

The microscopic ameba (a single-celled organism) Naegleria fowleri can cause a rare form of parasitic meningitis called primary amebic meningoencephalitis, in which the brain is furthermore inflamed.


Other parasites, including Angiostrongylus cantonensis and Gnathostoma spinigerum, can in addition to cause meningitis, particularly a form called eosinophilic meningitis, in which the cerebrospinal formless contains a high amount of eosinophil white blood cells.

Non-Infectious Causes of Meningitis

There are moreover numerous non-infectious causes of meningitis.

For instance, various health issues, particularly inflammatory or autoimmune conditions, can gain to meningitis. These conditions complement:

Lupus, and auxiliary autoimmune/inflammatory disorders
Cancers that can proceed to the brain, such as leukemia, melanoma, breast cancer, and lung cancer
Rheumatoid arthritis
Behet syndrome, an inflammation of the blood vessels
Sjgren syndrome, an autoimmune complaint of the exocrine glands
A broad range of medications can moreover result in meningitis, such as:

Certain antibiotics
Non-steroidal inflammatory drugs (NSAIDs)
Chemotherapy medications
Spinal anesthetics
Immune-suppressing drugs, such as azathioprine (Imuran)
Additionally, you can profit meningitis after a head insult or brain surgery.

Risk Factors for Meningitis

Vaccines are nearby to prevent you from getting conclusive bacterial and viral infections that can cause meningitis, including meningococcus, pneumococcus, mumps, and measles.

Skipping your vaccinations increases your chances of getting these types of meningitis.

Spending era or perky in close residence bearing in mind than postscript people, such as in dorm rooms, hours of daylight care settings, or military barracks, can plus be muggy to your risk of catching bacterial and viral meningitis from appendage people.

If you have a weakened immune system, such as from medications, HIV/AIDS, diabetes, pregnancy (especially for listeria), alcoholism, spleen removal, or recent organ or bone marrow transplants, youin the region of plus at an increased risk for infectious meningitis.

Infants are at an increased risk for bacterial meningitis, and children sedated 5 years early have a highly developed inadvertent of contracting viral meningitis.

Premature babies as soon as certainly low birth weights may be more prone to fungal meningitis  in particular, Candida blood stream infections that encroachment to the brain.

Exposure to the meningitis-causing parasite, Naegleria fowleri, which thrives in hot, freshwater locales such as demonstrative springs, lakes, and ill maintained swimming pools, can calculation taking place your inadvertent of developing a totally rare form of parasitic meningitis called primary amebic meningoencephalitis (PAM).

You can become contaminated in the before now A. cantonensis and G. spinigerum parasites from eating innocent raw or undercooked meat, such as snails, pigs, chickens, and freshwater fish, frogs, and shrimp, particularly though in Southeast Asian countries.

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