Spread of TEM, VIM, SHV, and CTX-M β-Lactamases in Imipenem-Resistant Gram-Negative Bacilli Isolated from Egyptian Hospitals

Figure 2

Presence and absence of β-lactamase genes by PCR amplification in some isolated samples. (a) The existence of VIM amplification fragment (390 bp). (b) The amplification of TEM fragments (800 bp). (c) The amplification of CTX-M-1 (688 bp). (d) The presence of SHV (713 bp) in some samples. (e) The presence of CTX-M-9 (561 bp). (f) No amplification was shown with CTX-M-8/25 primer at 326 bp.

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(b)

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(f)