Figure 4.

Concordance between resistance genotypes amplified with and without an initial Reverse Transcriptase (RT) step: (A) Resistance genotype concordance for 68 participants for whom paired PCR and RT-PCR genotypes were available (one participant per row). Color denotes resistance at the level of drug class. “O” symbols indicate that the genotype harbors at least one NRTI resistance mutation that is not observed in its associated pair, while “X” symbols indicate that the genotype harbors at least one NNRTI resistance mutation that is not observed in its associated pair; (B) Total number of resistance mutations observed in genotypes obtained with (right) and without (left) an initial RT step, where connecting lines indicate linked pairs.