Table 1.

primers for polymerase chain reaction (PCR) amplification of genes mediated resistance

Genes	Primers	Sequences (5'-3')	Products size (pb)
bla CTX-M	CTX-M1-F	TTGGTGACGATTTTAGCCGC	864
	CTX-M1-R	GGT TAA AAA ATC ACT GCG TC
bla SHV	SHV-F	TTATCTCCCTGTTAGCCACC	870
	SHV-R	GATTTGCTGATTTCGCTCGG
bla TEM	TEM-F	ATA AAA TTC TTG AAG ACG AAA	1080
	TEM-R	GAC AGT TAC CAA TGC TTA ATC A
bla OXA	OXA-48-F	GCTTGATCGCCCTCGATT	281
	OXA-48-R	GATTTGCTCCGTGGCCGAAA
bla NDM	NDM-F	GGTTTGGCGTCTGGTTTTC	621
	NDM-R	CGGAATGGCTCATCACGATC
bla VIM	VIM-F	GATGGTGTTTGGTCGCATA	390
	VIM-R	CGAATGCGCAGCACCAG