OBJECTIVE To explore the two kinds of free nucleic acid extraction reagents combined with DNA chip electrophoresis in rapid and accurate identification of New Delhi metallo-lactamase(NDM-1)-positive strains and understand the value of this combination method in rapid identification of prevalent pathogens so as to offer convenient means for rapid identification of prevalent pathogens.METHODS One(or 0.1)McNamara units NDM-1(+)bacterium was added to free nucleic acid extraction reagents for direct PCR amplific...