Research Article of International Journal of Animal Research
Relevance of probiotic, prebiotic and synbiotic supplementations on hemato-biochemical parameters, metabolic hormones, biometric measurements and carcass characteristics of sub-tropical Noemi lambs
S.F El-Mehanna1, M.M. Abdelsalam1, N.M. Hashem2, , K.E.M. El-Azrak2, M.M. Mansour3 and M.M Zeitoun1,2*
1Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University 51452, KSA
2Department of Animal and Fish Production, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
3Department of Animal and Poultry Production, Faculty of Agriculture, Damanhour University, Egypt.
The effects of probiotic, prebiotic and synbiotic preparations on hemato-biochemical parameters, metabolic hormones, biometric measurements and carcass characteristics of growing lambs were studied. Twenty four growing Noemi male lambs were randomly allocated into 4 groups (n=6/group) in a complete randomized design and blocked according to their initial weights. Lambs in the first group were orally given 50 ml of physiological saline (0.9% NaCl) and served as control (CON), while lambs in other three groups were orally given 50 ml of aqueous dandelion extract (PRE) or fermented cow’s milk supplemented with lactic acid bacteria (PRO) or their mixture (1:1, SYN) every other day for 8 consecutive weeks. The results indicated that treatment had no effects on hematological parameters, except leukocytes number which was elevated (P<0.05) in all treated lambs compared to CON-lambs. Treatments had no effect on blood serum cholesterol, whereas treatment with PRO and SYN increased (P<0.05) blood serum glucose. Blood serum insulin and IGF-I concentrations were higher (P<0.05) in lambs given SYN than lambs in other groups. Different supplementations improved (P<0.05) finishing weight of lambs compared to control. There were no significant differences in carcass weight and dressing percentage among treatments. Values of most carcass measurements were not affected by treatment except a significant increase in chest depth in all supplemented lambs compared to control. Regarding to eye muscle area, as an indicator of tissue growth, there was a tendency of increase in the carcass of PRO and SYN lambs as compared to those of PRE and CON-lambs. Most offal weights were not affected by treatment, however a significant increase in weight of digestive tract was observed for PRO-group compared with CON, but other treatments did not show a significant effect. Yield of commercial cuts was not affected by treatment except for breast and loin cuts. The heaviest breast weight was found in carcass of lambs given PRO (P<0.05) and the heaviest weight of loin cut was in favor of those given SYN. The meat in carcass of control and PRE was lower than that of PRO and SYN with no significant differences. In conclusion, supplementing probiotics fermented cow’s milk to growing lambs improves their metabolic status and thus growth efficiency without a significant change in their carcass traits.
Keywords: Sheep, dandelion extract, lactobacillus bacteria, synbiotic, metabolism, carcass, hematology.