Grobbelaar, Antoinette A.Weyer, JacquelineLeman, Patricia A.Kemp, AlanPaweska, Janusz TadeuszSwanepoel, Robert2012-01-172012-01-172011-12Grobbelaar, AA, Weyer, J, Leman, PA, Kemp, A, Paweska, JT & Swanepoel, R 2011, 'Molecular epidemiology of Rift Valley fever virus', Emerging Infectious Diseases, vol. 17, no. 12, pp. 2270-2276.1080-6040 (print)1080-6059 (online)http://dx.doi.org/10.3201/eid1712.111035http://hdl.handle.net/2263/17792Phylogenetic relationships were examined for 198 Rift Valley fever virus isolates and 5 derived strains obtained from various sources in Saudi Arabia and 16 countries in Africa during a 67-year period (1944–2010). A maximumlikelihood tree prepared with sequence data for a 490-nt section of the Gn glycoprotein gene showed that 95 unique sequences sorted into 15 lineages. A 2010 isolate from a patient in South Africa potentially exposed to co-infection with live animal vaccine and wild virus was a reassortant. The potential influence of large-scale use of live animal vaccine on evolution of Rift Valley fever virus is discussed.enCoordinating Center for Infectious Diseases, Centers for Disease Control and PreventionRift Valley fever virus (RVFV)Rift Valley fever -- Research -- South AfrcaArticle