Japanese Encephalitis (JE) is a mosquito borne viral infection, a major paediatric problem and is vaccine preventable encephalitis. Although various studies have been conducted on trends of JE, it is the intense need to study the trends and status of Acute Encephalitis Syndrome (AES) and JE in Bihar which lacks in data but not in the illness.

  This study was conducted over the period of four years, since January 2015 to December 2018, to understand the trends and status of the disease in Bihar. The data were collected from patients coming to Patna Medical College & Hospital, Patna, Bihar.

  The study is evident that there is similarity in the number of suspected AES cases as well as positive JE cases in the entire study of four years duration. There is high similarity in the seasonal pattern of suspected AES cases as well as positive JE cases