Mumps is one of the most common viruses to affect the central nervous system and should be given primary consideration in the differential diagnosis of aseptic meningitis. Many cases of numps infection do not involve the salivary glands.
The course of numps meningoencephalitis is usually benign, with fever and signs of meningeal irritation lasting less than five days. The findings in the cerebrospinal fluid are usually distinctive, with leukocyte content greater than 200 per milliliter, of which 80 per cent or more are lymphocytes. Sequelae, even of a minor nature, are rare.
Death is extremely rare in recorded literature. A fatal case of numps meningoencephalitis is described herein.