Screening and characterization of medicinal plants extracts with bactericidal activity against .

The aim of the present study was to perform a screening of extracts obtained from 15 medicinal plants using water (at 25 and 90 °C) or ethanol (at 25 °C), to bactericidal activity against cariogenic ATCC 25175, as well as to carry out the preliminary phytochemical characterization of the extracts and HPLC/MS assay for selected extracts. The extractions were carried out for 5 h at 400 rpm. Only five from 45 tested extracts were selected based on their antibacterial activity. The IC varied from of 28 ppm for up to 250 ppm for . Different polyphenolic and quinic acids, flavonoids, anthocyanin or tyrosol were identified by HPLC/MS in selected extracts from L. Sessé (Willd.) Poir L., and . The obtained results confirm that selected extracts are good candidates to be used for cariogenic bacteria control.