Cortney Loughran

2007-12-31-23.00.00-3Project title: Anthelmintic Efficacy of Birdsfoot Trefoil Hay Against Haemonchus contortus Larval Development

Mentor: Katherine Petersson

Abstract: Gastrointestinal nematodes (GIN) pose a major threat for the sustainable production of many small ruminants, such as, sheep and goats that can be highly susceptible to parasite infections. In particular, Haemonchus contortus is a parasite that affects the overall health of the animals by causing anemia, anorexia and negatively affecting nutrient absorption and subsequently effecting production. Nematodes such as H. contortus are able to infect small ruminants so readily because they are found naturally on pasture and are picked up by the livestock during regular grazing. Due to the widespread prevalence of anthelmintic resistance in small ruminant GIN, studies are being conducted to look into alternative methods such as forage legumes to combat the resistance. Our project was designed to test the efficacy of condensed tannin legume forages such as, birdsfoot trefoil, against GIN infections. To do this, a 16 week feed trial was conducted to test the efficacy of different varieties of birdsfoot trefoil hay on four fistulated ewes. The results of the project suggest a slight suppression in hatchability of larvae incubated in the feces of ewes fed birdsfoot trefoil.