meningitis is a potentially life-threatening infection that causes inflammation around the brain and spinal cord. it’s a disease that impacts public health, individual well-being, and the canadian health-care systems.
understanding the disease and its transmission, along with preventive measures and treatment options is crucial to protecting the health of canadians and effectively managing outbreaks.
what is meningitis?
meningitis is an infection that causes inflammation in the protective membranes (the meninges) that surround the brain and spinal cord. the infection can be caused by viruses, bacteria, or fungi. apart from that, meningitis can also be caused by injuries, cancer, specific medications, and various other types of infections.
symptoms can range from minor to severe, including headaches, fever, stiff neck, sensitivity to light, and a rash. in some instances, meningitis can be life-threatening, especially if caused by certain bacteria.
types of meningitis
meningitis can be categorized into several types based on its underlying cause. the main types of meningitis include;
- bacterial meningitis is caused by bacterial infections. it’s usually severe and can lead to serious health complications if not treated properly. meningitis caused caused by the bacterium neisseria meningitidis is known as invasive meningococcal disease (imd).
- viral meningitis is caused by viral infections, and is generally less severe than bacterial meningitis. most cases of viral meningitis are self-limiting and resolve on their own with supportive care. non-polio enteroviruses, herpesviruses, and mumps viruses are some viruses associated with viral meningitis.
- fungal meningitis is caused by fungal infections, which are typically rare but can be serious, especially in individuals with weakened immune systems. fungi like cryptococcus, histoplasma, and blastomyces species are common culprits.
- parasitic meningitis is a rare but severe form of meningitis caused by parasitic infections. unlike bacterial or viral meningitis, parasitic meningitis is typically not transmitted from person to person but is acquired through exposure to contaminated water or soil. the parasites can enter the body through the nose, eyes, or broken skin, and then migrate to the brain and spinal cord, causing inflammation of the meninges.
- amoebic meningitis is a rare and life-threatening form of meningitis caused by the amoeba naegleria fowleri. the amoeba enters the body through the nose, typically while swimming in warm freshwater bodies. once inside, it migrates to the brain and spinal cord, leading to severe inflammation of the meninges. amoebic meningitis progresses rapidly and has a high fatality rate, making early recognition and treatment crucial for potential survivors.