单词	Rift Valley fever
释义	Rift Valley fever noun : an acute, usually epizootic, mosquito-borne disease of domestic animals chiefly of eastern and southern Africa that is caused by a bunyavirus (species Rift Valley fever phlebovirus of the genus Phlebovirus), is marked especially by fever, abortion, and death of newborns, and is sometimes transmitted to humans usually in a milder form marked by flu-like symptoms Word History Etymology (Great) Rift Valley, Africa First Known Use circa 1931, in the meaning defined above Medical Definition Rift Valley fever noun Rift Val·​ley fever ˈrift-ˌval-ē-  : 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 phlebovirus), 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 flu-like symptoms
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