All Burkholderia pseudomallei strains used in this study.

aE10-E390 were received from Dr. Vanaporn Wuthiekanun, Wellcome Trust Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.bK96423 was received from Assoc. Dr. Surasakdi Wongratanacheewin, Melioidosis Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.cPP844 was received from Prof. Dr. Stitaya Sirisinha, Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.dNF10/38-NF154/37 were received from National Institute of Health of Thailand, Ministry of Public Health, Nonthaburi, Thailand.