Antibacterial activity of tannin constituents from Phaseolus vulgaris, Fagoypyrum esculentum, Corylus avellana and Juglans nigra

Tannins were fractionated from acetonic extract preparations of phenolic compounds from Phaseolus vulgaris, Fagoypyrum esculentum, Corylus avellana and Juglans nigra. Wide variations in antibacterial activities ranging from MICs of 62.5 to 500 mu g/ml were apparent. Of particular note was a relatively high level of activity (62.5 to 125 mu g/ml) for all extracts against Listeria monocytogenes. (C) 2008 Elsevier B.V All rights reserved.