Murray Valley encephalitis
noun
Mur·ray Val·ley encephalitis
| \ ˈmər-ē-ˈval-ē-
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Medical Definition of Murray Valley encephalitis
: an encephalitis endemic in northern Australia and Papua New Guinea that is caused by a virus of the genus Flavivirus (species Murray Valley encephalitis virus) transmitted by mosquitoes (especially Culex annulirostris) and that is often asymptomatic but may cause serious potentially fatal disease