Japanese B encephalitis

[jăp′ə-nēz]
n.
  1. An epidemic encephalitis or encephalomyelitis of Japan, Siberia, and other parts of Asia, caused by a virus of the genus Flavivirus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.