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Livestock Health, Management and Production ›High Impact Diseases › Vector-borne Diseases › Rift Valley fever Rift Valley fever Author: Prof. JAW Coetzer Adapted from: Swanepoel, R. & Coetzer, J.A.W. 2004. Rift Valley fever, in: Infectious diseases of livestock, edited by Coetzer, J.A.W. & Tustin, R.C. Cape Town: Oxford University Press Southern Africa, 2: 1037-1070. Licensed under a Creative Commons Attribution license. MARKETING AND TRADE / SOCIO-ECONOMICS The economic losses associated with epidemics of Rift Valley fever are considerable, and include inter alia mortality and abortion particularly in sheep and goats, international trade bans, and the costs involved in the production, distribution and administration of vaccines. When mortalities occur among valuable species of wildlife, the cost can be very high and the concomitant ban on hunting and translocation of wild animals can have a devastating effect on the hunting industry and the sale of wild animals. Rift Valley fever is a disease that must be reported to the World Organization for Animal Health by the veterinary authorities of member countries. On the strength of the zoonotic potential of Rift Valley fever virus and the economic losses associated with livestock and wildlife morbidity and mortality, knowledge of outbreaks in countries will inevitably lead embargoes on the free international trade of animals and animal products. Taken together with the known and threatening spread of this vectorborne pathogen beyond its traditional endemic boundaries, and the view that it may potentially be employed as a bioweapon agent, regulatory authorities usually apply strict import control measures for imports from countries experiencing outbreaks of the disease. This was amply demonstrated during 2000-2001 when trade embargos were imposed by Saudi Arabia and Yemen on animals and animal products from countries in the Horn of Africa. Similarly, the 2010 outbreak in South Africa prompted the regulatory authorities of several countries to ban the import of South African meat and live animals including livestock and wildlife from that country. The decision was based on the risk that viraemic animals may be sacrificed or hunted, which could pose a health risk to persons slaughtering such an animal. Video link: http://youtu.be/00sWFcT1wN0 1|Page