Table 1.

Bacterial strains used in this study and the susceptibility to copper sulfate

Strain	Serovar	Description		MIC, mM (ppm)		References
L-3841	4,[5],12:i:-	Wild type		6 [1,500]		18
L-3841NA	4,[5],12:i:-	Nalidixic acid-resistant mutant of L-3841		6 [1,500]		This study
L-3841ΔICEmST	4,[5],12:i:-	ICEmST deletion mutant derived from L-3841		1 [250]		22
L-3841Δcus	4,[5],12:i:-	cus gene cluster deletion mutant derived from L-3841		1 [250]		22
L-3841Δpco	4,[5],12:i:-	pco gene cluster deletion mutant derived from L-3841		6 [1,500]		22
L-3569	Typhimurium	Wild type		1 [250]		45
L-3569TC	Typhimurium	L-3569 transconjugant that acquired ICEmST		6 [1,500]		This study