[ effects of cadmium on blood parametens in broiler chicken]

ABSTRACT

To study the effects of various concentration of Cadmium [5, 50 and 100 ppm] on blood parameters in broiler chickens [Ross Breed]. Experimental study. Two hundred and eightyn Ross broiler chickens. The chickens were randomly categorized into 4 groups of 3 replicates each. The replicates were randomly distribued in 12 batteries. Blood were collected after 1, 2, 4 and 7 weeks and the values of RBC and WBC counts, Hb, PCV, MCV, MCHC, leukocyte differentiation and thrombocyte counts determined. ANOVA and Scheffe method. The valuse of RBC,PCV and Hb gradually showed increase during course of experiment in 5 ppm group compare to control. However there were no significant difference among groups. In 50ppm group RBC,PCV and Hb had decrease compare to control [p<0.05] but MCV and MCHC changes were not significant. Therefore, the anemia in the 50ppm group was normocytic normochromic type, while in the 100ppm group the valuse of RBC, PCV, Hb and MCHC had decrease [p<0.05], MCV, showed increase [p<0.05]. The results indicate that anemia in the 100ppm group is a macrocytic hypochromic type. WBC and heterophil counts showed increase between days 14 and 28 in 5, 50 and 100ppm treated groups compare to control. However the changes were not statistically significant. Furthermore, thrombocyte counts in 5ppm, 50ppm and 100ppm groups were significantly low [p<0.05]. It is concluded that cadmium administration causes gradual hematological changes which correlate with cadmium concentration in the diet