Methods to determine antipathogenic potential of phenolic and flavonoid compounds against urinary pathogen Serratia marcescens

► The selected compounds from edible fruits were tested for their QSI activity. ► The urinary pathogen Serratia marcescens was used as a test organism. ► The test QSI compounds reduce the virulence of S. marcescens. ► Serum resistance assay, a new method is used to study the QSI compounds efficiency. ► This study has provided a fresh insight into the potential of edible fruits as QSI.