Luke Kingry (Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, CO), John Young (Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, CO), Ryan Pappert (Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, CO), Martin Schriefer (Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, CO), Jeannine Petersen (Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, CO)