TABLE 1.

Number and percentage of nalidixic acid-resistant nontyphoid Salmonella isolates from human stools, Gipuzkoa, Spain, 1981 to 2003

Yr	Serovar Enteritidis			Serovar Typhimurium			Other serovars			Total
	Ra	Testedb	%Rc	R	Tested	%R	R	Tested	%R	R	Tested	%R
1981-1991	7	2,530	0.3	0	303	0	2	216	0.9	9	3,049	0.3
1992	1	265	0.4	2	51	3.9	0	15	0.0	3	331	0.9
1993	1	285	0.4	1	45	2.2	2	21	9.5	4	351	1.1
1994	2	161	1.2	0	39	0	7	34	20.6	9	234	3.8
1995	6	211	2.8	2	29	6.9	8	25	32.0	16	265	6.0
1996	23	223	10.3	2	56	3.6	4	35	11.4	29	314	9.2
1997	47	249	18.9	1	64	1.6	8	33	24.2	56	346	16.2
1998	59	413	14.3	0	69	0	12	34	35.3	71	516	13.8
1999	94	320	29.4	2	60	3.3	11	31	35.5	107	411	26.0
2000	129	344	37.5	7	64	10.9	3	18	16.7	139	426	32.6
2001	388	785	49.4	1	53	1.9	8	22	36.4	397	860	46.2
2002	267	799	33.4	6	60	10.0	10	32	31.3	283	891	31.8
2003	297	705	42.1	5	71	7.0	9	32	28.1	311	808	38.5
Total	1,314	7,290	18.1	29	964	3.0	84	548	15.3	1,434	8,802	16.3

^aR, number of nalidixic acid-resistant isolates.

^bTested, number of isolates tested.

^c%R, percent of nalidixic acid-resistant isolates.