Antibacterial Substances from Plants Collected in Indiana

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Abstract
The results are reported of a preliminary survey of antibacterial substances in a series of 120 or more plant samples collected in Indiana during the summer of 1944. The juice of the plants, or particular portions of them, obtained by a Carver hydraulic press, was tested for inhibitory activity against Bacillus subtilis and Escherichia coli with the Oxford cup technique. Representatives (1 to 50 specimens) of the following families were included: Acanthaceae, Aceraceae, Alismaceae, Anacardiaceae, Anona-ceae, Apocynaceae, Araceae, Asclepiadaceae, Balsaminaceae, Bignoniaceae, Caprifoliaceae, Celastraceae, Compositae, Convolvulaceae, Ericaceae, Euphorbiaceae, Gramineae, Iri-daceae, Juglandaceae, Labiatae, Lauraceae, Leguminosae, Liliaceae, Magnoliaceae, Martyniaceae, Menispermaceae, Nymphaeaceae, Onagraceae, Osmundaceae, Oxalidaceae, Papayaceae, Phytolaccaceae, Plantaginaceae, Polygonaceae, Polypodiaceae, Primulaceae, Ranunculaceae, Rosaceae, Rubiaceae, Salicaceae, Saxifragaceae, Scrophulariaceae, Simarubiaceae, Solanaceae, Tiliaceae, Typhaceae, Ulmaceae, Umbelliferae, Urticaceae, Violaceae, Vitaceae. Although about 1/10 of the specimens showed some degree of inhibitory activity against one or both test organisms, no sample was encountered which gave exceptionally high values. A marked stimulation of growth of the test organism was evident with many samples.

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