Table 1.

MIC ranges and MIC50–90 against selected pathogens.2,3,16–18,20–29,33,34

Organism	MIC Range	MIC50	MIC90
MSSA	≤0.008–1	0.12–0.25	0.25–0.5
MRSA	0.12–4	0.5–1	0.5–2
CONS	≤0.008–4	0.06–1	0.12–2
PSSP	≤0.008–0.25	≤0.008–0.015	≤0.016–0.06
PISP	≤0.008–0.5	0.015–0.13	0.006–0.13
PRSP	≤0.008–0.5	≤0.015–0.13	0.12–0.5
β-hemolytic streptococci	≤0.008–0.12	≤0.008–0.015	≤0.015–0.03
Viridans group streptococci	≤0.008–16	≤0.008–0.25	0.03–1
Enterococcus faecalisa	0.03–>32	1–4	4–16
Enterococcus faeciuma	0.06–>128	1–>64	16–>128
Acinetobacter spp	≤0.003–>64	2–>64	8–>64
Citrobacter freundii	0.06–128	0.12–>16	2–64
Enterobacter sppb	≤0.008–>128	≤0.12–>32	0.5–>32
Escherichia colib	≤0.008–>64	0.06–>32	0.12–>32
Klebsiella sppb	≤0.008–>32	0.06–>32	0.25–>32
Proteus spp	≤0.03–>32	0.06–>32	0.12–64
Salmonella spp	0.06–>32	0.12–0.13	0.25–>32
Haemophilus influenzaec	≤0.008–0.25	≤0.008–0.12	≤0.008–0.25
Moraxella catarrhalis	≤0.008–1	0.03–0.25	0.12–0.5
Pseudomonas aeruginosa	0.25–>128	16	>32
Serratia marcescens	0.015–>128	0.5–1	2–32
Bacteroides spp	0.03–>64	8–64	16–>64
Clostridium spp	≤0.008–64	0.06–2	0.25–16
Fusobacterium sppd	≤0.008–64	≤0.008–8	0.06–32
Propionibacterium acnes	≤0.008–0.125	≤0.008–0.03	0.06

Notes:

^aIncludes vancomycin-susceptible and -resistant strains;

^bincludes cephalosporin-sensitive and -resistant strains, as well as extended-spectrum β-lactamase-producing strains;

^cincludes β-lactamase positive and negative strains;

^dall isolates with MIC > 0.5 are F. mortiferum.

Abbreviations: MIC, minimum inhibitory concentration; MIC50, MIC for 50% of isolates; MIC90, MIC for 90% of isolates; MSSA, methicillin-susceptible Staphylococcus aureus; MRSA, methicillin-resistant S. aureus; CONS, coagulase-negative Staphylococcus; PSSP, penicillin-sensitive Streptococcus pneumoniae; PISP, penicillin-intermediate S. pneumoniae; PRSP, penicillin-resistant S. pneumoniae; spp, species.