What is meningitis? Meningitis
is an inflammation of the lining surrounding the brain and spinal cord.
This condition can be caused by several different organisms such as
bacteria and viruses.
Viral meningitis
is more common and usually occurs in the late Summer and early Fall.
Viral meningitis can be caused by several different viruses. Viral
meningitis may follow another viral illness such as infectious mono,
influenza, or mumps. It is spread by discharges from the nose and
throat. Because close intimate contact is required for infection, it is
not nearly as contagious as the common cold or influenza.
Symptoms
primarily include a sudden onset of fever, headache and a stiff neck.
Sometimes, abdominal discomfort, chest pain, or a rash will be present.
The central nervous system may be involved with possible alteration of
consciousness or paralysis; however, these more serious conditions are
infrequent. Most cases of viral meningitis run a short, uneventful
course. Since this is a virus (like the common cold), antibiotics are
not effective. Likewise, persons who have had contact with viral
meningitis patients do not require any treatment.
Research
suggests that the host's health status and ability to resist disease,
rather than viral factors, play an important determining role.
A lifestyle that helps keep the immune system as strong as possible
with a balanced diet, adequate rest and sleep, appropriate exercise and
the avoidance of excessive stress is very important. Factors, such as
avoiding upper respiratory tract illnesses and inhalation of cigarette
smoke, help to protect from invasive disease. Taking care to cover your
mouth when coughing or sneezing and frequent hand washing may be
preventive as well.
Bacterial meningitis
is a rare disease, but can be very serious and requires treatment with
antibiotics. It can occur sporadically throughout the year. One form of
bacterial meningitis is meningococcal meningitis .
This form can cause very grave illness. It requires early diagnosis and
treatment. Untreated meningococcal infection can be fatal. There is
also the blood-borne illness, meningococcemia, which refers to the
bacteria causing problems only in the blood, not in the lining
surrounding the brain and spinal cord. This can be just as serious as
meningococcal meningitis.
How are individuals infected with meningococcal meningitis (Bacterial Meningitis)?
Meningococcal disease is caused by the bacterium Neisseria meningitidis.
Meningococcal
bacteria cannot usually live for more than a few minutes outside the
body. They are usually not transmitted in water supplies, swimming
pools, or by routine contact in classrooms, dining rooms, bars,
restrooms, etc., where an infected individual has been. Roommates,
friends, spouses, and children who are not directly exposed to an ill
meningitis victim are not at risk. Persons who have had
intimate or direct exposure to a meningococcal meningitis patient
within seven days are at risk for contracting meningococcal meningitis
and should receive prophylactic medication. Intimate or direct exposure
includes being touched or kissed, sharing eating utensils, or by
droplet contamination from nose, throat, or any secretions or
excretions from the body of the infected individual.
Approximately
5% to 10% of the general population carry the meningococcal bacteria in
the nose and throat in a harmless state. This carrier state may last
for days or months and seems to give those individuals who harbor
meningococcus in their upper respiratory tract some protection from
actually developing the disease state.
During
epidemics of meningococcal meningitis, the carrier rate may increase,
yet less than 1% may develop the disease. This low occurrence of
illness after exposure suggests that an individual's health status (the
strength or weakness of the immune system), rather than bacterial
factors, plays an important determining role.
How many meningococcal meningitis cases occur each year? Every
year in the United States, 1,400 to 2,800 people get meningococcal
disease. Ten to 14 percent of people with meningococcal disease die,
and 11 - 19 percent of survivors have permanent disabilities. It is
estimated that 100 to 125 cases of meningococcal disease occur annually
on college campuses and 5 to 15 students die as a result. Early
recognition and treatment are the crucial variables to mortality.
Who is at risk? Recent
evidence found students residing on campus in dormitories appear to be
at higher risk for meningococcal disease than college students overall.
Further research recently released by the CDC shows freshmen living in
dormitories have a six times higher risk of meningococcal disease than
college students overall.
Although anyone
can come into contact with the bacteria that causes meningococcal
disease, data also indicates certain social behaviors, such as active
smoking, exposure to passive smoke, bar patronage, and excessive
alcohol consumption, may put students at increased risk for the
disease. Patients with respiratory infections, compromised immunity,
those in close contact to a known case, and travelers to endemic areas
of the world are also at increased risk. Cases and outbreaks usually
occur in the late winter and early spring when school is in session.
What makes meningococcal meningitis so dangerous?
Meningococcal meningitis can be particularly dangerous for two fundamental reasons:
- It
is relatively rare. Therefore, we may not consider the possibility of
contracting meningitis and may ignore early symptoms and signs. The
disease often begins with symptoms that can be mistaken for common
illnesses, such as the flu.
- It can be deceptive.
A person may experience minor cold symptoms for a few days and then
progress to severe meningococcal disease in a relatively short period
of time. In the rare instances when the meningococcus organism invades
the bloodstream (meningococcemia), it can be carried to other organs
including the eyes, heart, lungs, and the central nervous system (brain
and spinal cord.)
What are the usual symptoms and signs of meningococcal meningitis? The
early symptoms usually associated with meningococcal disease include
fever, severe headache, stiff neck, rash, nausea, vomiting, and
lethargy, and may resemble the flu. Because the disease progresses
rapidly, often in as little as 12 hours, students are urged to seek
medical care immediately if they experience two or more of these
symptoms concurrently.
What is the treatment for meningococcal meningitis exposure? The
use of prophylactic antibiotics such as Rifampin and Ciprofloxacin are
effective in most cases. The majority of patients with a reasonably
early diagnosis and treatment experience complete recovery. In rare
instances, a meningococcal infection is overwhelming and defies prompt
medical treatment.
What are some ways in which individuals can reduce their risk of contracting meningitis?
A
lifestyle which helps keep the immune system as strong as possible with
a balanced diet, adequate rest and sleep, appropriate exercise and the
avoidance of excessive stress is very important. Factors, such as
avoiding upper respiratory tract illnesses and inhalation of cigarette
smoke, help to protect from invasive disease. Taking care to cover your
mouth when coughing or sneezing and frequent hand washing may be
preventive as well. Again, research suggests that the host's health
status and ability to resist disease, rather than bacterial factors,
play an important determining role.