]]>Bacterial meningitis]]> is a serious condition, accounting for 80 percent of all meningitis cases, according to the ]]>Cleveland Clinic]]>. When left untreated, bacterial meningitis can be a life threatening disease, causing brain tissue to swell, which can affect blood flow in the brain.
Causes of Bacterial Meningitis
The Merck Manual Home Edition notes that Neisseria meningitides and Streptococcus pneumonia are the two most common strains of bacterial meningitis in an external environment. However, cases of bacterial meningitis caused by Streptococcus pneumonia have diminished, due to the recommended vaccinations. For some people, these strains of bacterial meningitis can exist in their nose and upper respiratory system without causing a problem.