Antimicrobial susceptibility of Gram-negative and Gram-positive bacteria collected from Eastern Europe: results from the Tigecycline Evaluation and Surveillance Trial (T.E.S.T.) 2011-2016.

•In vitro antimicrobial activity reported from the T.E.S.T. study (2011–2016).•Isolates collected from nine countries in Eastern Europe.•Low resistance to tigecycline among Enterobacteriaceae.•Tigecycline active against Gram-positive organisms.•Antimicrobial resistance problematic in Eastern Europe and requires surveillance.