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PCR amplification of IntI1 gene among some MDR E. coli isolates on 0.7% agarose gel. In all isolates, a fragment of 483 bp was detected. Lane L: DNA ladder. Lane 1, E. coli ATCC 25922 as a positive control for IntI1 gene; Lanes 2-15, Amplified gene of IntI1 in the tested clinical isolates
