Causes and Risks Coxsackie and echovirus, types of enterovirus, account for about half the cases of aseptic meningitis. Other enteroviruses and mumps are additional causes. The incidence of these infections increases in the summer and early fall.
Mumps is spread by respiratory secretions, with increased incidence in the spring.
Some viruses may cause a severe meningitis and, like bacterial meningitis , can produce permanent neurological deficits such as seizures , motor abnormalities, and mental retardation . Rabies virus causes both an inflammation of the brain and meninges or a meningoencephalitis. Please read it.