Figure 2. . A) IS6110 restriction fragment length polymorphism (RFLP) analysis (left) and polymorphic GC-rich repetitive sequence (PGRS) typing (right) of patient P11. Lane 1, initial isolate; lane 2, follow-up isolate. B) IS6110 RFLP (left) and PGRS typing (right) of patient P20 (lane 1) compared with patient P3 (lane 2), a typical outbreak-associated patient. Lane M, reference strain MTB14323.