Fariba Iranparast - Ms.c student of Animal Nutrition, Department of Animal Science, College of Agriculture,Yasuj University, Yasuj, Iran.
Siamak Parsaei - Assistant professore of Department of Animal Science, College of Agriculture, Yasuj University, Yasuj, Iran.
Mohammad Houshmand - Assistant professore of Department of Animal Science, College of Agriculture, Yasuj University, Yasuj, Iran.
Asghar Naghiha - Assistant professore of Department of Animal Science, College of Agriculture, Yasuj University, Yasuj, Iran.

This experiment was conducted to determine the effects of the oral consumption of guggul plant resin on the performance and humoral immunity response of broiler chicks. For doing this experiment, 320 oneday old chicks of the Cobb 500 strains, in a Completely randomized design with 4 treatments and 4replicates were used. Experimental diets include: control diet (without the guggul), control diet + 200 ppm guggul, control diet + 400 ppm guggul, control diets + 600 ppm guggul. Live body weight, feed consumption and feed conversion ratio were recorded at 21 and 42 d of experiment. To determineantibody titers against sheep red blood cell (SRBC) 1 ml of 3% suspension of sheep erythrocyte in phosphate buffer saline was injected into the wing veins at 29 and 35-day chicks. Treatments had significant effects on daily gain, feed conversion and feed intake during growth period (22-42 d).Treatments had significant effects on total antibody titers and IgY (p <0.05), but the effect of the treatments on the production of IgM was not significant. 6.The effect of the treatments on the bursa of Fabricius relative weight mean, was significant, but there was no significant effect on the spleen

antibody, broilers, guggul, humoral immunity, sheep red blood cell