TABLE 2.

Non‐susceptibility rates and MIC distribution of the Streptococcus pneumoniae and Streptococcus pseudopneumoniae isolates for 14 antimicrobials

Antibiotics	S. pneumoniae (n = 81)					S. pseudopneumoniae (n = 24)
	Non‐susceptibility		MIC (μg/ml)			Non‐susceptibility		MIC (μg/ml)
	I%	R%	MIC50	MIC90	Range	I%	R%	MIC50	MIC90	Range
Penicillin
Oral	56.8	13.6	0.25	2	≤0.03–>4	54.2	16.6	0.5	2	≤0.03–>4
Meningitis‐parenteral	‐ a	70.4	0.25	2	≤0.03–>4	‐ a	70.8	0.5	2	≤0.03–>4
Nonmeningitis‐parenteral	3.7	3.7	0.25	2	≤0.03–>4	4.2	4.2	0.5	2	≤0.03–>4
Amoxicillin/clavulanic acid	3.7	4.9	≤2	≤2	≤2–16	4.2	4.2	≤2	≤2	≤2–8
Ceftriaxone
Meningitis	7.4	9.9	≤0.12	1	≤0.12–>2	8.4	8.4	0.25	1	≤0.12–>2
Nonmeningitis	3.7	6.2	≤0.12	1	≤0.12–>2	0	8.4	0.25	1	≤0.12–>2
Cefotaxime
Meningitis	4.9	6.2	≤0.12	1	≤0.12–>4	8.4	8.4	0.25	1	≤0.12–>4
Nonmeningitis	2.5	3.7	≤0.12	1	≤0.12–>4	0	8.4	0.25	1	≤0.12–>4
Cefuroxime (parenteral)	8.6	19.8	≤0.5	≥4	≤0.5–>4	8.4	50	1	4	≤0.5–>4
Meropenem	9.9	7.4	≤0.25	0.5	≤0.25–2	20.8	8.4	≤0.25	0.5	≤0.25–2
Erythromycin	3.7	74.1	>2	>2	≤0.25–>2	0	95.8	>2	>2	≤0.25–>2
Azithromycin	8.6	66.7	>2	>2	≤0.25–>2	0	95.8	>2	>2	≤0.25–>2
Chloramphenicol	‐ a	39.5	2	16	≤1–16	‐ a	4.2	2	4	≤1–8
Trimethoprim/sulfamethoxazole	44.4	28.4	2	4	≤0.5–>4	8.4	70.8	>4	>4	≤0.5–>4
Tetracycline	4.9	82.8	>8	>8	≤1–>8	0	91.6	>8	>8	≤1–>8
Vancomycin	‐ a	‐ a	≤0.5	≤0.5	≤0.5	‐ a	‐ a	≤0.5	≤0.5	≤0.5
Levofloxacin	0	0	≤0.5	1	≤0.5–1	0	0	1	1.5	≤0.5–2
Moxifloxacin	0	0	≤1	≤1	≤1	0	0	≤1	≤1	≤1

Abbreviation: MIC, minimum inhibitory concentration.

^a No breakpoints listed.