José G. Estrada-Franco*, Roberto Navarro-Lopez†, Jerome E. Freier‡, Dionicio Cordova§, Tamara Clements¶, Abelardo Moncayo*, Wenli Kang*, Carlos Gomez-Hernandez#, Gabriela Rodriguez-Dominguez#, George V. Ludwig¶, and Scott C. Weaver* 

Author affiliations: *University of Texas Medical Branch, Galveston, Texas, USA; †Comision Mexico-Estados Unidos para la Prevencion de la Fiebre Aftosa y Otras Enfermedades Exoticas de los Animales, Mexico, Mexico City, Mexico; ‡U.S. Department of Agriculture, Fort Collins, Colorado, USA; §Instituto Nacional de Investigaciones Forestales Agricolas y Pecuarias (INIFAP) Mexico City, Mexico; ¶U.S. Army Medical Research Institute of Infectious Diseases, Ft. Detrick, Maryland, USA; #Instituto de Salud de la Secretaria de Salud de Chiapas, Tuxtla Gutierrez, Chiapas, Mexico