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A 2% (w/v) agarose gel image showing ESBL [blaTEM(1100 bp), blaSHV(740 bp), blaCTX-M (550 bp) and blaOXA (470 bp)] gene fragments amplified from E. coli isolates. Lane M = 1 kb DNA marker, Lane 1 = negative control, Lanes 5, 6, and 10 = blaTEM gene fragments, Lanes 2, 9, and 12 = blaTEM, blaSHV, blaCTX-M, and blaOXA gene fragments, Lane 3 = blaCTX-M gene fragments and Lanes 4, 7, 8, 11, and 13 = blaTEM, blaSHV, and blaCTX-M gene fragments amplified from E. coli isolates.
