Encephalitis toll in Bihar has risen to 221 since May this year following death of 12 more patients on Wednesday, official sources said.

Altogether 153 children have died due to symptoms of encephalitis in the Sri Krishna Medical College and Hospital and Kejriwal Charitable Hospital in Muzaffarpur, while 52 children have died in the Patna Medical College and Hospital, Additional Secretary (Health) R. P. Ojha told reporters here.