In order to determine breakpoints, the EUCAST Break-
points Subcommittee requires information from those promoting the antimicrobial agent. In the pursuit of international
collaboration, we have, whenever possible, used the wording
of a version of the NCCLS document M23 whichwas the subject of discussion at the time the EUCASTdocument was produced. The wording of this EUCASTdocument di¡ers from
that of the published versions of M23 and cannot be used as a
substitute when it is intended to follow NCCLS guidelines.
Rather, its purpose is to facilitate the provision of documentation required of those seeking a breakpoint determination in
Europe.