Representative patterns obtained by the GenoType MTBDR-plus test for isolates with dual mutations in the rpoB gene based on sequencing. Lane 1, ΔWT8 (sequenced mutations in rpoB, H526N and L533P); lane 2, ΔWT8 and MUT3 (rpoB D444V and S531L); lane 3, ΔWT2 and ΔWT7 (rpoB S511P and H526N); lane 4, ΔWT3 and ΔWT4 (rpoB D516Y and T525I); lane 5, ΔWT2 and ΔWT3 (rpoB Q513E and M558K).