Discipline: Veterinary Medicine
The study was conducted to examine the effect of oral supplementation with aloe vera (Aloe barbadensis) on the immune response of broiler chickens to Newcastle disease (ND). Two percent (2%) solution prepared from extracts of fresh aloe vera gel was effective in increasing mean antibody titers to ND. The total WBC count was also considerably higher in hands that received the aloe vera solution. Significant increases in the absolute differential counts of monocytes, lymphocytes and heterophils were also observed in treated birds compared with controls. These results have demonstrated the potential of aloe vera in enhancing the immune response of broiler chickens to ND and in reducing the predisposition of birds to this debilitating disease.