Viral disease that can cause mild to life-threatening symptoms, usually contracted from infected animals, or by infected mosquito bites.Encyclopedia Entry for Rift Valley Fever :Rift Valley Fever- Rift valley fever virus- Bunyavirus- PhlebovirusEncyclopedia Entry for Rift Valley Fever :Rift valley fever virus. Phlebovirus. Human, mammals, mosquitoes, sandflies. Zoonosis, arthropod bite. Associated with Hemorrhagic feverEncyclopedia Entry for Rift Valley Fever :Rift valley fever virus. Phlebovirus. Human, mammals, mosquitoes, sandflies. Zoonosis, arthropod bite. Associated with Hemorrhagic feverEncyclopedia Entry for Rift Valley Fever :Rift Valley fever (RVF). Source of disease: Rift Valley fever virus