FIG 1.

Subclades from parsimony tree in Fig. S1 in the supplemental material. (A) Representative clade from the tree shown in Fig. S1 illustrating examples of isolates from the same patient and isolates from sibling patients 032 and 034. All isolates from the same patient are monophyletic, and the isolates from the sibling patients also form a single clade. (B) Another clade from the tree in Fig. S1 showing isolates from a pair of siblings. Each sibling clade is monophyletic, and the two clades are derived from a common ancestor that infected both patients 246 and 247.