Back to Top Skip to main content
This infographic describes Rift Valley Fever (RVF) virus ecology and how RVF infects livestock and humans.   •	First the enzootic cycle begins. It is maintained via transfer from parent mosquito to offspring. This is a local, low-level transfer of disease to livestock and happens during periods of average rainfall. •	Next, high rainfall and flooding enable Aedes mosquito breeding environments to flourish. This is followed by epizootic outbreaks, which cause abortion storms in animals, with > 90% mortality in newborns and 10-20% mortality in adults. Secondary vectors, including other mosquito genera such as Culex, can pass on the virus to humans and animals.  Spillover to humans includes exposure to blood and tissue of infected livestock and occurs during slaughter or birthing activities. Humans can also be infected with RVF via bites of infected mosquitos.

This infographic describes Rift Valley Fever (RVF) virus ecology and how RVF infects livestock and humans.

Recommended Content:

Armed Forces Health Surveillance Branch | Mosquito-Borne Illnesses

What's New

DHA Address: 7700 Arlington Boulevard | Suite 5101 | Falls Church, VA | 22042-5101

Some documents are presented in Portable Document Format (PDF). A PDF reader is required for viewing. Download a PDF Reader or learn more about PDFs.