Rift Valley fever

Rift Val·ley fever

noun \ˈrift-ˌval-ē-\

Definition of RIFT VALLEY FEVER

: an acute usually epizootic mosquito-borne disease of domestic animals (as sheep and cattle) chiefly of eastern and southern Africa that is caused by a bunyavirus of the genus Phlebovirus (species Rift Valley fever virus), is marked especially by fever, abortion, death of newborns, diarrhea, and jaundice, and is sometimes transmitted to humans usually in a milder form marked by flulike symptoms