Serotype Distribution and Antimicrobial Resistance of Streptococcus pneumoniae Isolates Causing Invasive and Noninvasive Pneumococcal Diseases in Korea from 2008 to 2014

Table 4

Resistance rates to antimicrobial agents by age.

Antibiotic	Total (378)			⁢≤5 years ()			⁢≥65 years ()			⁢6–64 years ()
	I	R	S	I	R	S	I	R	S	I	R	S
Amoxicillin	30 (8.2)	61 (16.8)	273 (75.0)	3	6	7	18	37	138	9	18	128
Azithromycin	11 (3.2)	244 (72.0)	84 (24.8)		13	2	7	126	39	4	105	43
Cefaclor	12 (3.7)	222 (68.7)	89 (27.6)		12	3	7	115	45	5	95	41
Cefepime	73 (22.0)	22 (6.6)	237 (71.4)	4	4	8	36	12	123	33	6	106
Cefotaxime	30 (9.4)	13 (4.1)	277 (86.6)	6	2	7	13	8	143	11	3	127
Ceftriaxone	33 (10.2)	15 (4.7)	274 (85.1)	6	3	6	13	10	142	14	2	126
Cefuroxime IV	11 (3.7)	199 (66.1)	91 (30.2)		12	2	8	101	46	3	86	43
Chloramphenicol	3 (0.9)	91 (26.7)	247 (72.4)		1	14	3	50	120		40	113
Clindamycin		193 (56.9)	146 (43.1)		13	2		106	71		74	73
Erythromycin	5 (1.4)	258 (73.3)	89 (25.3)		13	2	4	135	42	1	110	45
Levofloxacin	2 (0.6)	26 (7.2)	331 (92.2)			16	2	19	164		7	151
Meropenem	114 (32.9)	91 (26.2)	142 (40.9)	7	6	3	53	50	74	54	35	65
Penicillin IV	57 (17.8)	29 (9.0)	235 (73.2)	7	3	5	28	14	122	22	12	108
Tetracycline	5 (1.4)	256 (72.7)	91 (25.9)		13	2	2	130	49	3	113	40
Trimethoprim/sulfa	38 (10.3)	141 (38.3)	189 (51.4)	1	11	4	17	78	96	20	52	89
Vancomycin			352 (100)			15			181			156

I: intermediate; R: resistant; S: susceptible.