Lineage 2 West Nile Virus as Cause of Fatal Neurologic Disease in Horses, South Africa oleh Marietjie Venter, Stacey Human, Dewald Zaayman, Gertruida H. Gerdes, June Williams, Johan Steyl, Patricia A. Leman, Janusz Tadeusz Paweska, Hildegard Setzkorn, Gavin Rous, Sue Murray, Rissa Parker, Cynthia Donnellan, Robert Swanepoel