Rift Valley Fever Underlying Cause
Rift Valley fever is caused by a flavivirus that is transmitted from animals to humans through the bite of a mosquito. After infection, the virus may or may not cause illness.
Rarely, the virus causes inflammation of the brain, called encephalitis, or hemorrhagic fever, both of which can cause severe symptoms.
Continue to Rift Valley Fever Transmission
- Centers for Disease Control and Prevention (CDC). Rift Valley Fever--East Africa, 1997-1998. MMWR Morb Mortal Wkly Rep. 1998 Apr 10;47(13):261-4. 
- Gerdes GH. Rift Valley fever. Rev Sci Tech. 2004 Aug;23(2):613-23. 
- Nabeth P, Kane Y, Abdalahi MO, Diallo M, Ndiaye K, Ba K, Schneegans F, Sall AA, Mathiot C. Rift Valley fever outbreak, Mauritania, 1998: seroepidemiologic, virologic, entomologic, and zoologic investigations. Emerg Infect Dis. 2001 Nov-Dec;7(6):1052-4.