POLA1 and tuberculosis: Similarly, primary PDR-TB mainly consisted of PDR1 (INH + EMB, 0.12%, 14), PDR2 (INH + SM, 3.41%, 391), PDR3 (RFP + EMB, 0.06, 7), PDR4 (RFP + SM, 0.33%, 38), PDR5 (INH + EMB + SM, 0.14%, 16) (Table 2).