Pattern of Encephalitis In Pondicherry And Adjoining Districts Of Tamil Nadu

Abstract

A retrospective study was done of 856 cases of encephalitis admitted at JIPMER, Pondicherry from 1979 to 1985. There were two epidemic peaks in 1981 and 1983. The disease occurred mainly in the paediatric age group (80% of the case) with an overall mortality of 52%. A strong seasonal trend was also seen, a major peak in the rainy season (October & November) and a small peak in summer. Males were affected more than females (2 : 1.1); however mortality was equal in the sexes. The disease was found to be a leading cause of death in the hospital (5.5% of all deaths) more so in the paediatric population (13.5 % of all paediatric deaths). The various epidemiologic factors are discussed.