The effect of short-term consumption of a forage containing condensed tannins on gastro-intestinal nematode parasite infections in grazing wether goats

Abstract The effect of grazing a forage containing condensed tannins (CT), sericea lespedeza (SL, Lespedeza cuneata , 46 g extractable CT/kg DM), on the total fecal egg production of gastrointestinal nematodes (GIN) and egg hatch percentage was compared with a control forage low in CT (rye/crabgrass (RC), 6 g extractable CT/kg DM) using Spanish wether goats (47.0 kg BW). A crossover experimental design was utilized with groups of five and six animals. Each group grazed one forage species in the first 15 day period and then were switched so they grazed the other forage species during the second 15 day period. The mean fecal egg count (FEC) and total fecal egg output (TFEO) were reduced (2500 versus 710 eggs/g, P 4 eggs per day, P P