Table 1. Burkholderia pseudomallei isolates used in this study.

Sequence type	Greatest linear distance between isolates (km)	Strain	Year	Sample type	Location	Genetic marker presence
						Cluster*	bimA†	fhaB3
149	460	MSHR0116	1992	Clinical	Remote island, Northern Territory	BTFC	Bp	Pos
		MSHR0356	1995	Clinical	Remote island, Northern Territory	BTFC	Bp	Pos
		MSHR0503	1997	Environmental	Remote island, Northern Territory	BTFC	Bp	Pos
		MSHR4300	2010	Environmental	Katherine region, Northern Territory	BTFC	Bp	Pos
722	300	MSHR0052	1989	Clinical	Darwin region, Northern Territory	YLF	Bp	Pos
		MSHR9076	1998	Clinical	Katherine region, Northern Territory	BTFC	Bm	Pos
804	1000	MSHR3528	2009	Environmental	Remote Central Australia, Northern Territory	BTFC	Bp	Pos
		MSHR4608	2011	Environmental	Darwin region, Northern Territory	BTFC	Bp	Pos

*BFTC, Burkholderia thailandensis-like flagella and chemotaxis cluster; YLF, Yersinia-like fimbriae cluster.

†Bp, Burkholderia pseudomallei type bimA; Bm, Burkholderia mallei type bimA.