Correction: increase in resistance to extended-spectrum cephalosporins in salmonella isolated from retail chicken products in Japan.

There are a number of errors in Table 1. Please see the corrected Table 1 here.

Table 1

Number of tested chicken meat product samples, detected Salmonella isolates, resistant isolates, and resistance genes by year.

Isolation year	1996	1997	1998	1999	2000	2001	2002	2003
No. of samples tested	41	21	34	34	35	36	33	39
No. of Salmonella-positive samples	16	9	6	4	20	16	14	21
(%)	(39.0%)	(42.9%)	(17.6%)	(11.8%)	(57.1%)	(44.4%)	(42.4%)	(53.8%)
No. of Salmonella isolates	16	12	6	5	20	16	14	21
No. of samples from which multiple Salmonella serotypes were isolated	0	3	0	1	0	0	0	0
Salmonella serotypes isolated, (No. of isolate)	Corvallis (1)*,	Agona (1),	Corvallis (3),	Infantis (3),	Corvallis (1),	Haifa (2),	Infantis (12),	Cerro (1),
	Haifa (1),	Corvallis (1),	Enteritidis (1),	Untypeable with O7 (1),	Infantis (18),	Infantis (8),	Yovokome (1),	Haifa (1),
	Infantis (12),	Haifa (1),	Infantis (1),	Untypeable (1)	Untypeable with O7 (1)	Virchow (2),	Untypeable with O7:y:- (1)	Infantis (14),
	Typhimurium (1),	Infantis (5),	Typhimurium (1)			Untypeable with O18: Z4, Z23: —(3),		Manhattan (2),
	Untypeable with O4:i: (1)	Typhimurium (2),				Untypeable with O7 (1)		Untypeable (3)
		Untypeable with O4:b:- (1),
		Untypeable with O8:z4,z24 (1)
Untested isolates with antimicrobial susceptibility	-	-	-	-	-	-	-	-
No. of tested isolates	16	12	6	5	20	16	14	21
(No. of samples)	(16)	(9)	(6)	(4)	(20)	(16)	(14)	(21)
No. of resistant isolates	0	0	0	0	0	0	0	0
(Percentage of tested isolates)	(0.0%)	(0.0%)	(0.0%)	(0.0%)	(0.0%)	(0.0%)	(0.0%)	(0.0%)
Detected resistance genes and serotypes	-	-	-	-	-	-	-	-
Isolation year	2004	2005	2006	2007	2008	2009	2010	Total
No. of samples tested	35	40	40	40	157	88	106	779
No. of Salmonella-positive samples	13	22	13	22	76	48	55	355
(%)	(37.1%)	(55.0%)	(32.5%)	(55.0%)	(48.4%)	(54.5%)	(51.9%)	(45.6%)
No. of Salmonella isolates	13	25	14	24	81	50	61	378
No. of samples from which multiple Salmonella serotypes were isolated	0	3	1	2	4 †	2	6	22
Salmonella serotypes isolated, (No. of isolate)	Enteritidis (1),	Enteritidis (1),	Dunkwa (1),	Corvallis (1),	Enteritidis (1),	Enteritidis (1),	Agona (1),	Infantis (180),
	Infantis (9),	Haifa (1),	Infantis (8),	Emek (1),	Eppendorf (2),	Infantis (14),	Infantis (20),	Schwarzengrund (70),
	Manhattan (1),	Corvallis (1),	Manhattan (3),	Enteritidis (1),	Infantis (33),	Manhattan (8),	Manhattan (19),	Manhattan (52),
	Yovokome (1),	Infantis (15),	Schwarzengrund (2)	Eppendorf (1),	Jamaica (1),	Schwarzengrund (21),	Schwarzengrund (18),	Untypeable (11),
	Untypeable (1)	Manhattan (2),		Infantis (8),	Manhattan (15),	Untypeable with O4 (3),	Virchow (1),	Corvallis (8),
		Montevideo (1),		Manhattan (2),	Schwarzengrund (21),	Untypeable (3)	Untypeable with O4 (1),	Enteritidis (6),
		Schwarzengrund (1),		Schwarzengrund (7),	Untypeable with O-untypeable:r:1,5 (3),		Untypeable (1)	Haifa (6),
		Typhimurium (1),		Typhimurium (1),	Unrecorded (5)			Typhimurium (6),
		Untypeable (2)		Untypeable with O4 (1),				Unrecorded (5),
				Untypeable with O7 (1)				and other serotypes ‡
Untested isolates with antimicrobial susceptibility	-	-	-	-	Unrecorded (5)	-	-	5
No. of tested isolates	13	25	14	24	76	50	61	373
(No. of samples)	(13)	(22)	(13)	(22)	(71)	(48)	(55)	(350)
No. of resistant isolates	0	2	0	1	8	7	17	35
(Percentage of tested isolates)	(0.0%)	(8.0%)	(0.0%)	(4.2%)	(10.5%)	(14.0%)	(27.9%)	(9.4%)
Detected resistance genes and serotypes	-	CMY-2 (Infantis, n = 1) § ,	-	CMY-2 (Infantis, n = 1)	CMY-2 (Infantis, n = 5),	CMY-2 (Infantis, n = 6),	CMY-2 (Infantis, n = 11),	CMY-2 (Infantis, n = 24),
		TEM-20 (Infantis, n = 1)			CMY-2 (O-untypeable:r:1,5, n = 1),	TEM-52 (Manhattan, n = 1)	CMY-2 (Manhattan, n = 1),	CTX-M-15 & TEM-1 (Manhattan, n = 2),
					TEM-52 (Infantis, n = 1),		TEM-52 (Manhattan, n = 1),	TEM-52 (Manhattan, n = 2),
					CTX-M-2 (Manhattan, n = 1)		CTX-M-2 (Infantis, n = 1)	CMY-2 (Manhattan, n = 1),
							CTX-M-15 & TEM-1 (Manhattan, n = 2),	CMY-2 (O-untypeable:r:1,5, n = 1),
							SHV-12 (Manhattan, n = 1)	CTX-M-2 (Infantis, n = 1),
								CTX-M-2 (Manhattan, n = 1),
								SHV-12 (Manhattan, n = 1),
								TEM-20 (Infantis, n = 1),
								TEM-52 (Infantis, n = 1)

*Corvallis, Salmonella enterica subsp. enterica serovar Corvallis.

†One sample contained three serotypes, while other multi-Salmonella samples contained two serotypes.

‡Other serotypes, untypeable with O4 (5), untypeable with O7 (4), Eppendorf (3), untypeable with O18: Z4, Z23: —(3), untypeable with O-untypeable:r:1,5 (3), Virchow (3), Agona (2), Yovokome (2), Cerro (1), Dunkwa (1), Emek (1), Jamaica (1), Montevideo (1), untypeable with O4:b:- (1), untypeable with O4:i: (1), untypeable with O7:y:- (1), and untypeable with O8:z4,z24 (1).

§CMY-2, bla CMY-2.

In Table 2, cells including “Thi0073 study” in the Reference column should read “This study”. Please see the corrected Table 2 here.

Table 2

Sequences of primers used in this study.

bla gene	Purpose	Primer Name	Nucleotide Sequence 5′–3′	Reference
bla CMY	Detection	cmy-F	GACAGCCTCTTTCTCCACA	[22]
		cmy-R	TGGAACGAAGGCTACGTA	[22]
	Sequencing	CMY2-outF	GTTACAATGTGTGAGAAGCAGTC	This study
		CMY2-outR	ATGGGATTTTCCTTGCTGTA	This study
		CMY2-R0	CAGTATTTCGTGACCGGA	This study
		CMY2-F3	CTGGATTACGGTTCCGCA	This study
bla CTX-M	Detection and Sequencing	CTX-MU1	ATGTGCAGYACCAGTAARGT	[23]
		CTX-MU2	TGGGTRAARTARGTSACCAGA	[23]
	Sequencing	bla CTX-M-1, forward	CTTCCAGAATAAGGAATCCC	[26]
		bla CTX-M-1, reverse	CGTCTAAGGCGATAAACAAA	[26]
		CTX-outF2	GCCAAGGGATAATACTAATAGAGG	This study
		CTX-outR	GCGGAATGATAGAAAGAGATGAG	This study
		CTX-F2	ACAATACTGCCATGAATAAGCTG	This study
		CTX-R0	CAATCAGCTTATTCATGGCA	This study
bla TEM	Detection	MAb/F	GGGGAGCTCATAAAATTCTTGAAGAC	[24]
		MAb/R	GGGGGATCCTTACCAATGCTTAATCA	[24]
	Sequencing	MAb-F2	AGCCCTCCCGTATCGTAGTT	This study
		MAb-F1	GAGGACCGAAGGAGCTAACC	This study
		MAb-outR	AACTACGATACGGGAGGGCT	This study
bla SHV	Detection	SHV-F	AGGATTGACTGCCTTTTTG	[25]
		SHV-R	ATTTGCTGATTTCGCTCG	[25]
	Sequencing	SHV-forw	CAAAACGCCGGGTTATTC	[27]
		SHV-rev	TTAGCGTTGCCAGTGCT	[27]
		SHVseq-forw	GGATTGACTGCCTTTTTGC	[27]
		SHVseq-rev	GCAAAAAGGCAGTCAATCC	[27]