Disability-adjusted life year for<unk>  per 100,000 inhabitants in 2004. Untreated, bacterial<unk>  is almost always fatal. Viral<unk> , in contrast, tends to resolve spontaneously and is rarely fatal. With treatment, mortality (risk of death) from bacterial<unk>  depends on the age of the person and the underlying cause. Of newborns, 20–30% may die from an episode of bacterial<unk> . This risk is much lower in older children, whose mortality is about 2%, but rises again to about 19–37% in adults. Risk of death is predicted by various factors apart from age, such as the pathogen and the time it takes for the pathogen to be cleared from the cerebrospinal fluid, the severity of the generalized illness, a decreased level of consciousness or an abnormally low count of white blood cells in the CSF.<unk>  caused by H. influenzae and meningococci has a better prognosis than cases caused by group B streptococci, coliforms and S. pneumoniae. In adults, too, meningococcal<unk>  has a lower mortality (3–7%) than pneumococcal disease. In children there are several potential disabilities which may result from damage to the nervous system, including sensorineural hearing loss, epilepsy, learning and behavioral difficulties, as well as decreased intelligence. These occur in about 15% of survivors. Some of the hearing loss may be reversible. In adults, 66% of all cases emerge without disability. The main problems are deafness (in 14%) and cognitive impairment (in 10%). Tuberculous<unk>  in children continues to be associated with a significant risk of death even with treatment (19%), and a significant proportion of the surviving children have ongoing neurological problems. Just over a third of all cases survives with no problems.
Meningitis
Lyme disease
Cerebritis
Naegleriasis
Encephalitis
Meningoencephalitis
Neuroleptic malignant syndrome
Meninges