Table 1: Sequences of PCR oligonucleotide primers used in this study.

Target gene	Primer sequence (5' – 3')	Expected amplicon size	Source
blaOXA-51	F: TAATGCTTTGATCGGCCTTG R: TGGATTGCACTTCATCTTGG	353 bp	[20]
aacC1	F: GCAGTCGCCCTAAAACAAAG R: CCCGTATGCCCAACTTTGTA	456 bp	[17]
aadA1	F: GAAGCCACACAGTGATATTGATTT R: GTTCCATAGCGTTAAGGTTTCATT	397 bp	[22]
aadB	F: GCATATCGCGACCTGAAAGC R: GACACAACGCAGGTCACATTGAT	524 bp	[17]
aphA6	F: ATGGAATTGCCCAATATTATTC R: TCAATTCAATTCATCAAGTTTTA	780 bp	[23]