Antimicrobial study of bark from five tree species

The antimicrobial activities of chloroform, methanol and aqueous extracts o f the bark of Gymnanthes lucida, Gliricidia sepium, Lysiloma divaricata, Ly siloma tergemina and Coccolaba cozumelensis were tested against S. lutea, E , coli, S, epidermidis, L, monocytogenes, S. choleraesuis, S. aureus, P. ae ruginosa, B. pumillus, S. typhimurium, P. vulgaris, V. cholerae and C. albi cans. It was found that methanol extracts of the two Lysiloma species and G. sepi um had antimicrobial effects against S, epidermidis, S, aureus, P, aerugino sa, B. pumillus and V. cholerae at doses of 200 mug. The major inhibitory e ffect was observed with L, tergemina which showed a bacteriostatic effect o n S, epidermidis at doses of 400 mug/mL. Copyright (C) 2001 John Wiley & So ns, Ltd.