Detection of Antibodies to West Nile Virus in Horses, Costa Rica, 2004 - Hobson-Peters, Jody; Arévalo, Carolina; Cheah, Wai Yuen; Blitvich, Bradley J.; Tan, Cindy Si En; Sandis, Alexis; Araya, Luis Nazario; Hernández, Jose Luis; Toye, Philip G.; Hall, Roy A. (Mary Ann Liebert Inc, 2011)