In the traditional civilization, one of the plants which have been used for ethno medical purposes is Anacardium occidentale. It has been reported to inhibit the growth of medically important microorganisms. Pseudomonas aeruginosa is an opportunistic pathogen. It takes advantage of an individual's weakened immune system to create an infection. Therefore aim of the present work was to investigate the antibacterial activity of methanol extracts of different parts of Anacardium occidentale on Pseudomonas aeruginosa strains. Methanol extract of leaves, bark, shell and nut was tested against 5 strains of Pseudomonas aeruginosa. It was found that all Pseudomonas aeruginosa strains (100%) were sensitive to Anacardium occidentale shell extract and nut extract followed by leaves extract (20%). However bark extract was not effective against it. Antibiotic resistance profile showed that all Pseudomonas aeruginosa (100%) were sensitive to Gatifloxacin, which was the highest among all other antibiotics tested followed by Meropenem (80%) and Piperacillin (20%). The synergistic activity of extract and antibiotic Gatifloxacin, showed that, the organisms were much sensitive to this combination. Pseudomonas aeruginosa (80%) was found to be sensitive each to leaves extract and bark extract. The present study highlighted remarkable antibacterial activities of A. occidentale extracts on Pseudomonas aeruginosa
Anacardium occidentale, Pseudomonas aeruginosa, Antibacterial activity
