[Acute meningoencephalitis and the problem of viral persistence in complicated rubella].

The results of combined clinico-virological and immunological examinations of 25 children with rubellar meningoencephalitis are presented. The meningoencephalitis was preceded by typical rubella in 24, and by rubellar infection without eruptions in 1 child. In 6 children the rubella virus was isolated from the cerebrospinal fluid in the acute period of the disease (5th to 19th days), and in 2 children it was re-isolated on the acute period of the disease (5th to 19th days), and in 2 children it was re-isolated on the 17th-19th days. A persistence of the immunoglobulins M specific to the rubella virus was revealed both in the acute period of the disease and long time after the disease onset (the observation period was 409 days). The data obtained confirm the etiological role of the rubella virus in the development of rubellar meningoencephalitis, suggesting that the rubella virus may persist in complicated post-natal rubella.