Do you mean symptoms. Fever, headache, increased sensitivity to light and sound, stiff neck, nausea and vomiting, changes in thinking, level of consciousness, and so on. If you think you are getting meningitis go see a doctor asap instead of trying to diagnose yourself.
Susceptable/exposed. A variety of germs that cause meningitis can be carried by healthy folks in their nose& throat & these folks never get ill. They can pass it on to their environment thru secretions or droplets of a sneeze. A susceptable person then acquires the germ and it invades their system, often thru the sensitive linings of the nasal passages. We're not sure why some get sick & some don't.
Spread of meningitid. Meningitis as in miningococcal meningitis can be acquired by droplet infection from an infected individual. Insect bites may spread forms of meningencephalitis such as lyme disease affecting the brain, and spread to the brain from an infection elsewhere in the body, such as bacterial ear infection spreading via the blood stream from one area to another.
Spinal tap. Spinal tap (lumbar puncture) will determine if there's meningitis and what the organism causing the infection is.
Quite common.... ..If you're diagnosed and treated with antibiotics right away.
Dangerous. In the elderly, the flagrant fever, stiff neck, etc, may be relatively absent or minimal, and perhaps only the acute onset of confusion and disorientation, with headache, may be witnessed. However, as insidious as the presentation may be, a bacterial meningitis by even a bug such as listeria, can be deadly, without appropriate antibiotics.
Close contact. Individuals having close contact with affected patient in such settings as same household, daycare, military barracks, and college dorm, are at higher risk to get infected.
Meningitis. Most bacterial menigitises are infectious although relatively few people become infected. Neisseria meningitis is very infective and needs to be treated immediately or fatal consequences may occur.
Depends. Meningitis means inflammation of the tissues around the brain and spinal column. When caused by infection transmission from person to person depends upon which organism is the causative agent. Neisseria meningitidis (meningococcus) may be highly communicable with close contact. Epidemics seen in institutions, military training camps, schools and within family units.