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Neighbor-joining tree using the concatenated sequences of all seven loci for Thai and Australian isolates (n = 266 and n = 158, respectively). Isolates from Thailand are labeled in red; those from Australia are labeled in blue. The majority of Australian isolates appear to belong to a single clade, although a small number of Thai isolates also cluster within this group, possibly reflecting recent migration events. A clade composed entirely of Thai isolates is also apparent.
