1Viral and Rickettsial Diseases Department, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, USA, E-mail: woradee.l@hotmail.com
2Entomology Department, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand, E-mail: woradee.l@hotmail.com
3Uniformed Services University of the Health Sciences, Bethesda, USA, E-mail: woradee.l@hotmail.com