Table 2. Antimicrobial susceptibility and MICs of 175 S.pneumoniae strains isolated from respiratory infection Children younger than 5 years.

Antibiotic agents	MIC (μg/ml)			No. of isolates (%)			Non-susceptible rate (%)
	50%	90%	range	Resistant	Intermediate	Susceptible
Erythromycin	≥1	≥1	≥1	175(100.0)	0(0.0)	0(0.0)	100.0
Penicillin G	2	≥8	≤0.031–≥8	20(11.4)	49(28.0)	106(60.6)	39.4
Cefotaxime	2	≥4	≤0.06–>4	43(24.6)	54(30.9)	78(44.6)	55.4
Ceftriaxone	1	≥4	≤0.06–≥4	14(22.6)	10(16.1)	38(61.3)	38.7
Amoxicillin	≤2	≥8	≤0.06–≥8	44(25.1)	30(17.1)	101(57.7)	42.3
Co-trimoxazole	≥4	16	≤0.5–≥32	147(84.0)	19(10.9)	9(5.1)	94.9
Clindamycin	≥1	≥1	≥1	175(100.0)	0(0.0)	0(0.0)	100.0
Tetracycline	≥8	≥16	≤1–≥16	163(93.2)	2(1.1)	10(5.7)	94.3
Levofloxacin	≤2	≤2	≤0.5–≤2	0(0.0)	0(0.0)	175(100.0)	0.0
Chloromycetin	≤4	4	≤2–≥32	8(4.6)	0(0.0)	167(95.4)	4.6
Vancomycin	≤1	≤1	≤1	0(0.0)	0(0.0)	175(100.0)	0.0