Fig. 1

Agarose gel electrophoresis of las I and las R genes among the P. aeruginosa strains PCR products. M; size of DNA marker (50-bp), lane 1; (negative control) (PCR product of qnr A and qnr B gene) and lane 2; (positive control of las I gene), lane 3; (PCR product of las I gene in clinical strains), lane 4; (positive control of las R gene), lane 5; (PCR product of las R gene in clinical strains)