Table 2.

Quantitative polymerase chain reaction primer pairs used in this study.

Target genes	Sequence (5′→3′)	Amplicon size(bp)	Annealing temperatures (°C)	Reference
sul1	CACCGGAAACATCGCTGCA	158	60	Luo et al., 2010
	AAGTTCCGCCGCAAGGCT
aac(6′)-Ib-cr	GTTTCTTCTTCCCACCATCC	103	60	Yang et al., 2018
	AGTCCGTCACTCCATACATTG
ermB	CACCGAACACTAGGGTTGC	129	55	This study
	TGTGGTATGGCGGGTAAGT
bla CTX-M	CAGATTCGGTTCGCTTTCAC	103	55	Yang et al., 2018
	GCAAATACTTTATCGTGCTGATG
mcr-1	CATCGCGGACAATCTCGG	116	56	Yang et al., 2017
	AAATCAACACAGGCTTTAGCAC
tetM	TTCAGGTTTACTCGGTTCA	106	55	This study
	GAAGTTAAATAGTGTTCTTGGAG
16S rRNA	CGGTGAATACGTTCYCGG	128	55	Suzuki et al., 2000
	GGWTACCTTGTTACGACTT