Volume 82, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



We investigated the epidemiology and etiology of encephalitis at four tertiary hospitals in Bangladesh during 2003–2005. Patients who met a clinical case definition for acute encephalitis and had cerebrospinal fluid (CSF) pleocytosis were eligible for enrollment; a standardized sampling pattern was used to enroll eligible patients. Recent Japanese encephalitis virus (JEV) infection was defined by presence of IgM antibodies against JEV in CSF or serum. Twenty (4%) of 492 cases had laboratory evidence of recent JEV infection; two died. All JE cases occurred during May–December, and cases were identified among all age groups. All cases resided in rural areas. Fifteen patients were re-assessed 4–6 weeks after hospitalization; 5 (33%) patients had physical disabilities and 7 (47%) reported cognitive difficulties. Infection with JEV is clearly an etiology of encephalitis in Bangladesh. Population-based studies to quantify burden of disease could assess options for targeted immunization programs.


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  • Received : 11 Mar 2009
  • Accepted : 01 Sep 2009

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