European Committee on Antimicrobial Susceptibility Testing
v_7.0_Breakpoint_Tables
v_7.0_Breakpoint_Tables
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Moraxella catarrhalis EUCAST Clinical Breakpoint Tables v. 7.0, valid from 2017-01-01<br />
Fluoroquinol<strong>on</strong>es<br />
MIC breakpoint<br />
(mg/L)<br />
Disk<br />
c<strong>on</strong>tent<br />
Z<strong>on</strong>e diameter<br />
breakpoint<br />
(µg) (mm)<br />
S ≤ R > S ≥ R <<br />
Ciprofloxacin 0.5 0.5 5 26 A 26 A<br />
Levofloxacin 1 1 5 26 A 26 A<br />
Moxifloxacin 0.5 0.5 5 23 A 23 A<br />
Nalidixic acid (screen) NA NA 30 23 B Note B<br />
Norfloxacin (uncomplicated UTI <strong>on</strong>ly) - - - -<br />
Ofloxacin 0.5 0.5 5 25 A 25 A<br />
Notes<br />
Numbered notes relate to general comments and/or MIC breakpoints.<br />
Lettered notes relate to the disk diffusi<strong>on</strong> method.<br />
A. The nalidixic acid disk diffusi<strong>on</strong> test can be used to screen for fluoroquinol<strong>on</strong>e resistance. See Note B.<br />
B. Isolates categorised as susceptible to nalidixic acid can be reported susceptible to ciprofloxacin, levofloxacin, moxifloxacin and<br />
ofloxacin. Isolates categorised as n<strong>on</strong>-susceptible may have fluoroquinol<strong>on</strong>e resistance and should be tested against the<br />
appropriate agent.<br />
Aminoglycosides<br />
MIC breakpoint<br />
(mg/L)<br />
Disk<br />
c<strong>on</strong>tent<br />
Z<strong>on</strong>e diameter<br />
breakpoint<br />
(µg) (mm)<br />
S ≤ R > S ≥ R <<br />
Amikacin IE IE IE IE<br />
Gentamicin IE IE IE IE<br />
Netilmicin IE IE IE IE<br />
Tobramycin IE IE IE IE<br />
Notes<br />
Numbered notes relate to general comments and/or MIC breakpoints.<br />
Lettered notes relate to the disk diffusi<strong>on</strong> method.<br />
Glycopeptides and lipoglycopeptides<br />
MIC breakpoint<br />
(mg/L)<br />
Disk<br />
c<strong>on</strong>tent<br />
Z<strong>on</strong>e diameter<br />
breakpoint<br />
(µg) (mm)<br />
S ≤ R > S ≥ R <<br />
Dalbavancin - - - -<br />
Oritavancin - - - -<br />
Teicoplanin - - - -<br />
Telavancin - - - -<br />
Vancomycin - - - -<br />
Notes<br />
Numbered notes relate to general comments and/or MIC breakpoints.<br />
Lettered notes relate to the disk diffusi<strong>on</strong> method.<br />
Macrolides, lincosamides and streptogramins<br />
MIC breakpoint<br />
(mg/L)<br />
Disk<br />
c<strong>on</strong>tent<br />
Z<strong>on</strong>e diameter<br />
breakpoint<br />
(µg) (mm)<br />
S ≤ R > S ≥ R <<br />
Azithromycin 0.25 1 0.5 1 Note A Note A<br />
Clarithromycin 0.25 1 0.5 1 Note A Note A<br />
Erythromycin 0.25 0.5 15 23 A 20 A<br />
Roxithromycin 0.5 1 1 1 Note A Note A<br />
Telithromycin 0.25 0.5 15 23 20<br />
Notes<br />
Numbered notes relate to general comments and/or MIC breakpoints.<br />
Lettered notes relate to the disk diffusi<strong>on</strong> method.<br />
1/A. Erythromycin can be used to determine susceptibility to azithromycin, clarithromycin and roxithromycin.<br />
Clindamycin - - - -<br />
Quinupristin-dalfopristin - - - -<br />
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