The phylogeny of <i>M. tuberculosis</i> in South East Asia.

<p>Large sequence polymorphisms define six major lineages of <i>M. tuberculosis</i> (A) which are strongly associated with specific geographical regions (B). In Vietnam, three lineages cause the majority of disease: the East Asian/Beijing, the Indo-Oceanic, and the Euro-American (adapted from reference 1). Numercial values in the figure represent regions of deletions (RD) that define each of the lineages.