TABLE 2.

Distribution of 9,243 pneumococcal isolates according to MICs of penicillin and cefotaxime in Spain from 1990 to 1996^a

MIC cefotaxime (μg/ml):	No. of strains for which the MIC of penicillin (μg/ml) is:								Total no. of strains
	≤0.06	0.12	0.25	0.5	1	2	4	8
≤0.06	4,650	114	21	2	2	0	0	0	4,789
0.12	52	175	223	28	1	0	0	0	479
0.25	8	41	282	233	21	1	0	0	586
0.5	6	4	41	451	806	73	0	0	1,381
1	0	0	4	64	1,049	652	7	0	1,776
2	0	0	1	0	37	134	22	2	196
4	0	0	0	1	1	3	16	7	28
8	0	0	1	0	0	0	0	7	8
Total no. of strains	4,716	334	573	779	1,917	863	45	16	9,243

^aSusceptibility categorizations for penicillin and cefotaxime: highly resistant, MIC ≥ 2 μg/ml (both); moderately resistant, 0.12 μg/ml ≤ MIC ≤ 1 μg/ml and MIC = 1 μg/ml, respectively; and susceptible, MIC ≤ 0.06 μg/ml and ≤ MIC ≤ 0.5 μg/ml, respectively.