PCR amplification of blaNDM-1 gene in different bacterial strains. M: DNA ladder 100bp. Lane 1,3,6: Amplified PCR product of P. aeruginosa blaNDM-1 gene. lANE 2: Amplified PCR product of K. pneumoniae blaNDM-1 gene. Lane 8,9,10: Amplified PCR product of E. coli blaNDM-1 gene.