TABLE 1.

Oligonucleotide primers used in PCR amplification

Primer	Location (5′–3′)a	Sequence (5′–3′)
A1	301–320	GTTAACTCATTATGAACGTA
A1′	866–852	TGTTGTCGTGTCTCG
A2	667–680	GGATGTCGCTCGCA
A2′	1212–1193	TAAATCAGTTACGGCTATTC

^aOligonucleotide positions are given according their location on the GN79 bla gene sequence (24).