TABLE 2.

Salmonella isolates used in this study

ARS no.	Serovar	Source species	Regiona	Kanr ColE1 plasmid groupb	aph sequencec
518	Newport	Chicken	2	A2	i
550	Newport	Chicken	2	B	i
574	Newport	Cattle	3	C3	ii
576	Newport	Cattle	3	C	ii
604	Newport	Reptile	4	A	i
612	Heidelberg	Swine	3	N/T	iii
674	Newport	Cattle	2	B	i
688	Newport	Cattle	3	A	i
695	Heidelberg	Swine	2	N/T	i
711	Heidelberg	Swine	3	N/T	i+ii
720	Heidelberg	Turkey	3	N/T	i+ii
799	Typhimurium	Swine	3	N/T	iv
815	Newport	Cattle	3	C	ii
816	Typhimurium var. 5− (DT104)	Cattle	1	A	i
838	Newport	Swine	1	B	i
850	Typhimurium	Swine	1	N/T	i+ii
852	Typhimurium (DT104)	Dairy cattle	1	C	ii
870	Typhimurium (DT104)	Cattle	1	A	i
871	Typhimurium (DT104)	Swine	1	A	i
872	Typhimurium (DT104)	Environmental	1	A	i
886	Bardo	Dairy cattle	1	C2	ii
892	Newport	Cattle	4	A	i
894	Newport	Cattle	1	A	i
908	Typhimurium var. 5− (DT104)	Cattle	1	A	i
910	Bredeney	Turkey	1	N/T	i+ii
917	Newport	Equine	1	B	i
918	Newport	Miscellaneous mammal	1	B	i
936	Heidelberg	Dairy cattle	1	B2	i
937	Heidelberg	Dairy cattle	1	B2	i
938	Typhimurium var. 5− (DT104)	Environmental	1	A	i

^aRegions in the United States: region 1, the northeast (CT, DE, IN, MA, MD, ME, MI, NH, NJ, NY, OH, PA, RI, and VT); region 2, the southeast (AL, FL, GA, KY, NC, PR, SC, TN, VA, and WV); region 3, the midwest (IA, IL, KS, MN, MO, ND, NE, SD, and WI); and region 4, the southwest (AR, LA, MS, OK, and TX).

^bKan^r ColE1 plasmid group: A, pU302S (AY333433); A2, pU302S variant; B, pSN11/00Kan (GQ470395); B2, pSN11/00Kan variant; C, new KAN plasmid type identified in this report; C2/C3, new Kan plasmid variant; N/T, Kan^r nontransformable.

^caph sequence identical to GenBank accession number: i, AY333433; ii, GQ426885; iii, V00359; iv, AY260546.