Expert Rules

EUCAST expert rules (listed below) are a tabulated collection of expert knowledge on interpretive rules. These rules should be applied to antimicrobial susceptibility testing to rationalise testing, reduce errors, and make appropriate recommendations for reporting particular resistances.

Rules are graded according to supporting evidence, labelled A, B and C:

A. There is good clinical evidence for the rule, i.e., applying the rule likely improves patient care. Grade A required clinical studies supporting the rule.
B. Evidence is weak or based on only a few case reports or on experimental data. Animal studies were accepted as experimental data.
C. There is no clinical evidence, but in vitro microbiological data suggest that the rule should be applied. 

Documents may be updated separately, which is why dates may eventually differ between documents.

For previous versions of documents, see the document archive.