A wide variety of mosquito species (Aedes, Culex, Mansonia, Anopheles, Entremapodites, etc.) act as the vector for transmission of RVF virus. Uninfected mosquitoes feed on infected viraemic animals or humans and transmit the infection to another host in their subsequent feed. Also, Aedes mosquitoes are capable of transovarian transmission to offspring via eggs, so new generations of infected mosquitoes may hatch from their eggs. This provides a durable mechanism for maintaining the virus in nature, as the eggs of these mosquitoes may survive for periods of up to several years in dry conditions. Possibly other blood suckling insects, as sandfly and culicoides, could act as vectors. Also, transmission through direct handling of infected animals or meat and contact with blood and other body fluids of infected animals were documented. Consumption of raw milk of infected animals could be a possible mode of transmission but consumption of meat of infected animals does not appear to be a common means of transmission.