<prompt> Which of the following is the MOST common cause of sporadic viral encephalitis in adults?Herpes virusEnterovirusesEbstein-Barr virusHIV  <response>: The most commonly identified viruses causing sporadic cases of acute encephalitis in adults are herpesviruses HSV, VZV, EBV. Note Frequently Asked: Enteroviruses coxsackieviruses, echoviruses, and human enteroviruses 68-71 are the most commonly identified viruses causing sporadic cases of acute meningitis. Ref: Roos K.L., Tyler K.L. 2012. Chapter 381. Meningitis, Encephalitis, Brain Abscess, and Empyema. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo Eds, Harrisons Principles of Internal Medicine, 18e 