Antibacterial activity and interference of Lantana camara L. and Lantana montevidensis Briq. in resistance of aminoglycosides

Abstract

In this work we report the antibacterial activity and interference of Lantana camara L. and L. montevidensis Briq. in activity of antibiotics classes of aminoglycosides. The extracts of leaves and roots of L. camara (EFLc and ERLc) and L. montevidensis (EFLm and ERLm) were assessed for antibacterial activity alone and in combination with aminoglycosides, by microdilution test. Standard and multi-resistant bacteria were used. The extracts showed an inhibitory activity for Gram-positive and Gram-negative analyzed. The most effective activity was demonstrated by the EFLm against Pseudomonas aeruginosa (MIC 8 µg/mL), and Escherichia coli (MIC 16 µg/mL). Synergistic effects were observed in the interaction of the extracts with the aminoglycosides, with a reduction of MICs. A synergistic effect was observed by ERLm interaction with amikacin in P. vulgaris, with reduction of MIC (625-20 µg/mL). These data are promising and indicate that extracts of L. camara and L. montevidensis can be an alternative source of natural products with antibacterial activity and potential to modulate resistance to aminoglycosides.