| the effect of purified condensed tannins of forage plants from botswana on the free-living stages of gastrointestinal nematode parasites of livestock. | the effect of condensed tannins (ct) extracted from forage plants from botswana on the free-living stages of a number of species of gastrointestinal nematode parasites derived from infected sheep were investigated using in vitro assays. fresh samples of five different plants (viscum rotundifolium, viscum verrucosum, tapinanthus oleifolius, grewia flava and ipomoea sinensis) were collected over two summers (february 2009 and 2010). fractionation of each crude extract on a sephadex lh-20 column yi ... | 2013 | 23927915 |