Information required for the determination of antimicrobial
susceptibility test breakpoints
In vitro drug characteristics
Information is required on the use of diluents and solvents;
preparation of stock solutions; stability of the drug in appro-
priate concentrations at storage and incubation temperature;
and the relationship or comparability of MIC endpoints
de¢ned by di¡erent methods, for broth and agar methods and
media, for relevant representative organisms.