Performance of lambs under four levels of dietary supplementation and artificially mix-infected with Haemonchus contortus and Trichostrongylus colubriformis

Abstract The effect of four diets on the performance Dorper lambs that were artificially mix-infected with 1000 infective larvae (L3) Haemonchus contortus and L3 Trichostrongylus colubriformis every three days for 12 weeks was evaluated. For each diet, one infected group (n = 7) control 4) set up. contained following proportions hay (H) concentrate (C): Diet 1 - 100%H; 2 75%H:25%C; 3 50%H:50%C; 4 25%H:75. All groups showed decreases in mean packed cell volume (PCV) total plasma protein, especially 1-infected, which also highest fecal egg count. infection had significant effects (P < 0.05) daily body weight gain (DBWG), cold carcass food consumption. DBWG (in kg), respectively, 0.048 0.025 1; 0.082 0.067 2; 0.188 0.189 3; 0.303 0.221 4. In conclusion, affected productive regardless diet; however, increased metabolizable protein energy, risk occurrence anemia hypoproteinemia diminished.