Anthelmintic effect of heather in goats experimentally infected with Trichostrongylus colubriformis

摘要: The effects of heather (composed primarily Calluna vulgaris with a smaller content Erica umbellata and cinerea) consumption on the establishment incoming infective larvae (experiment 1, preventive treatment) an adult worm population 2, curative were investigated in Cashmere goats experimentally infected Trichostrongylus colubriformis. In experiment 12 castrated male divided into two groups: heather-supplemented vs. non-supplemented animals. After 2 weeks adaptation to diet, all per os 6,000 T. colubriformis third-stage larvae. Three post-infection, slaughtered, counts as well female fecundity development determined. Heather was associated close significant (P=0.092) reduction (mean 14 %) establishment. No effect observed, but length worms supplemented greater (P<0.001). 15 non-lactating does At 6 three groups established: control, polyethylene glycol. Individual faecal nematode egg output measured twice weekly assess gastrointestinal excretion. slaughtered 5 after administration (11 post-infection), subsequently (P<0.001) decrease (between 47 66 % compared control group) excretion from 45 76 days post-infection. Although lower goats, no differences observed. Overall, results showed when administered goats. plus glycol treatment reduced levels at same proportion heather, thereby suggesting that threshold tannins required for anthelmintic is most likely quite low.