Antibacterial activity of flower extract of Caesalpinia pulcherrima, Delonix regia and Peltaphorum ferrugineum against Urinary tract Pathogens

摘要

The present study was conducted with an aim of determining antibacterial efficacy of methanol extract of flowers of Caesalpinia pulcherrima, Delonix regia and Peltaphorum ferrugineum belonging to the family Fabaceae. Antibacterial efficacy of flower extracts was assessed by Agar well diffusion assay against five antibiotic resistant bacteria isolated from urinary tract infection. Among flower extracts, higher inhibitory activity was shown by C. pulcherrima followed by P. ferrugineum and D. regia. Susceptibility to extract was recorded higher in case of Gram positive bacteria when compared to Gram negative bacteria. Among bacteria, S. aureus and K. pneumoniae were inhibited to higher and least extent respectively. The flowers of the plants selected can be the potential sources for development of therapeutically important agents active against drug resistant urinary tract pathogens. Isolation of active components from flower extracts and their inhibitory activity against urinary tract pathogens are to be carried out.