Recognized Interpretive Criteria

 

Minimum Inhibitory
Concentrations
(mcg/mL)

Disk Diffusion
(zone diameter in mm)

Pathogen

S

I

R

S

I

R

Enterobacterales*

≤8/4

16/4

≥32/4

≥25

21-24

≤20

Pseudomonas aeruginosa

≤16/4

32/4-64/4

≥128/4

≥21

15-20

≤14

Acinetobacter spp.

M100 standard is recognized

Haemophilus influenzae and parainfluenzae

M100 standard is recognized

Anaerobes

M100 standard is recognized

-

-

-

S = Susceptible; I = Intermediate; R = Resistant

*Clinical efficacy was shown for E. coli and K. pneumoniae

Exception to the recognized standard of CLSI M100

For the bacteria listed below, susceptibility test interpretive criteria are not recognized at this time:

Other Non-Enterobacterales