Table 1.

Selected Salmonella serotypes and numbers of patterns in three groups used in this study

S. enterica serotype group and name	No. of patterns in the present study				Isolates from human sources, 1996-2006a
	Group 1	Group 2	Group 3	Total	Rank	Total no. for the period	% of total
Most frequent serotypes (n = 20)
Agona	980	973	0	1,953	14	5,820	1.5
Braenderup	923	927	158	2,008	13	5,833	1.5
Enteritidis	929	914	495	2,338	2	69,547	17.8
Hadar	905	929	147	1,981	16	4,392	1.1
Heidelberg	915	1,008	191	2,114	4	20,473	5.2
I 4,[5],12:i:−	922	927	431	2,280	15	4,698	1.2
Infantis	917	926	235	2,078	11	6,031	1.5
Javiana	910	890	302	2,102	5	13,513	3.5
Mississippi	904	908	187	1,999	17	4,063	1.0
Montevideo	954	923	164	2,041	7	9,459	2.4
Muenchen	915	961	94	1,970	8	7,960	2.0
Newport	914	911	180	2,005	3	32,955	8.4
Oranienburg	963	988	0	1,951	9	6,783	1.7
Paratyphi B var. L(+) tartrate+	908	916	187	2,011	19	3,987	1.0
Poona	906	949	101	1,956	20	3,100	0.8
Saintpaul	954	940	358	2,252	10	6,322	1.6
Thompson	907	934	204	2,045	12	5,903	1.5
Typhi	935	1,006	0	1,941	18	3,990	1.0
Typhimurium	918	923	223	2,064	1	75,058	19.2
Typhimurium var. 5−	908	925	313	2,146	6	9,523	2.4
Less frequent serotypes (n = 12)
Anatum	106	116	256	478	23	2,218	0.6
Bareilly	100	101	225	426	24	2,051	0.5
Berta	109	100	293	502	21	2,488	0.6
Derby	105	107	181	393	29	1,642	0.4
Hartford	105	113	313	531	27	1,836	0.5
Litchfield	134	103	164	401	30	1,567	0.4
Mbandaka	159	111	162	432	25	2,048	0.5
Panama	124	104	288	516	28	1,698	0.4
Paratyphi A	115	20	0	135	35	1,163	0.3
Schwarzengrund	119	106	0	225	31	1,538	0.4
Senftenberg	97	92	0	189	32	1,457	0.4
Stanley	117	102	241	460	22	2,273	0.6
Total	19,877	19,953	6,093	45,923		390,767	100.0

^aData were derived and calculated from the CDC's Salmonella annual summary of 2006 (4). Rank indicates the frequency of isolation, with lower numbers indicating greater frequency. During this period, the 20 most frequent serotypes were represented by 299,410 isolates, or 76.6% of the total of 390,767 isolates for the period, and both groups together were represented by 321,389 isolates, or 82.2% of the total number of isolates.