TABLE 1.

Antimicrobial susceptibility and serogroups of 22 isolates of MDR S. pneumoniae from Korea

Strain no.	Isolation year	Specimen source	Serogroup	MIC of (μg/ml)a:
				PC	CTX	CTR	CLO	CFX	AM	IMP	TC	EM	CM
R6				≤0.03	≤0.03	≤0.03	≤1	≤0.03	≤0.03	≤0.03	0.5	≤0.06	4
Sp23Fb	1989		23	2	1	1	128	8	2	0.5	16	≤0.06	32
1	1989	Cerebrospinal fluid	23	4	2	2	64	8	4	0.5	8	1	8
2	1989	Cerebrospinal fluid	23	4	2	2	64	8	4	1	8	1	8
3	1990	Blood	23	4	2	2	128	8	4	0.5	8	0.25	8
4	1990	Sputum	6	4	2	2	128	8	4	0.5	8	2	8
5	1990	Ascites	23	4	2	2	128	4	4	0.5	4	0.25	8
6	1991	Ascites	19	4	2	2	128	8	4	0.5	16	2	16
7	1991	Sputum	23	4	2	2	128	4	4	0.5	1	0.25	8
8	1991	Blood	23	4	2	2	128	8	4	0.5	0.5	2	8
9	1992	Blood	6	4	2	2	128	8	4	0.5	8	1	8
10	1992	Blood	23	4	2	2	128	8	4	0.5	1	0.25	8
11	1992	Sputum	23	4	2	2	128	4	4	0.5	0.5	1	16
12	1992	Sputum	19	4	2	2	128	8	4	0.5	16	0.5	16
13	1993	Sputum	19	4	2	2	128	8	4	0.5	2	2	8
14	1993	Blood	6	2	2	2	128	8	4	0.5	4	0.25	16
15	1993	Blood	19	4	2	2	128	8	8	0.5	4	0.25	16
16	1994	Blood	19	4	2	2	128	4	4	0.5	2	16	16
17	1994	Sputum	23	4	2	2	128	8	4	0.5	4	4	16
18	1995	Sputum	23	2	4	2	128	8	4	0.5	8	8	8
19	1995	Sputum	19	2	4	2	128	8	4	0.5	16	32	4
20	1995	Sputum	23	2	4	2	128	8	4	0.5	32	32	4
21	1995	Sputum	23	4	4	2	128	8	4	0.5	32	32	4
22	1995	Sputum	23	2	4	2	128	8	4	0.5	16	0.26	16

^aPC, penicillin; CTX, cefotaxime; CTR, ceftriaxone; CLO, cefaclor; CFX, cefuroxime; AM, ampicillin; IMP, imipenem; TC, tetracycline; EM, erythromycin; CM, chloramphenicol. 

^bSp23F, Spanish 23F clone.