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Articles by S.A. Pourbakhsh
Total Records ( 2 ) for S.A. Pourbakhsh
  A. Talebi , S.A. Pourbakhsh and K. Dorostkar
  Vaccination is often considered as an appropriate option in prevention most of poultry viral diseases worldwide. This study was conducted to evaluate effects of current routine vaccination routes (spray, eye-drop and drinking water) of live vaccines against infectious bronchitis (IB) on performance and humoral immune responses of broiler chickens. The results of this study indicated that Vaccination significantly (P< 0.05) affects performance of the broiler chickens and effects on weight gain and FCR, did not differed significantly among these routes. Immune responses of vaccinated chickens were significantly (P< 0.001) differed from those of control chickens. Comparison of various vaccination routes revealed that eye-drop group had the highest antibody titer with the closest range. There were also positive significant (P< 0. 01) degrees of correlation among chickens vaccinated with spray and eye-drop, spray and drinking water, eye-drop and drinking water (r = 0.84, r = 0.80 and r = 0.82, respectively). In conclusion, eye-drop method induced the highest antibody titers with the closest range.
  M. Amiri Andi , M. Shivazad , S.A. Pourbakhsh , M. Afshar , H. Rokni , N.E. Shiri , A. Mohammadi and Z. Salahi
  Broiler breeders were allocated at random to one of seven experimental diets containing graded levels of supplementary vitamin E (0, 20, 40, 60, 80, 100 and 120 IU kg-1 diet) between 26-35 weeks of age. Egg production, egg weight, fertility, livability and hatchability (30 and 35 weeks of age) were not influenced by the level of vitamin E in the breeder diet. But birds receiving 40 IU of vitamin E kg-1 diet had higher hatchability of fertile eggs compared to 0 and 20 IU of vitamin E kg-1 groups at 35 weeks of age (90.79 vs. 85.09 and 86.60%, respectively). Dietary levels of vitamin E did not affect antibody titer (IgG) against Newcastle disease virus at 35 weeks of age. Antibody titer of day old chicks from hens receiving 60 IU of vitamin E kg-1 were higher (p≤0.05) than chicks from hens fed 0 and 20 IU of vitamin E. At 35 weeks of age (not at 31 weeks of age), Hugh units of eggs were higher (p≤0.05) in hens fed 40, 60, 80, 100 and 120 IU of vitamin E kg-1 compared to 0 IU of vitamin E kg-1 (87.06, 92.21, 93.89, 93.25, 94.61 and 93.09, respectively). Age had negative effect on Hugh units of eggs (p≤0.01). The results of this experiment suggest that the vitamin E requirement of broiler breeders for persisting of hatchability may be 40 IU kg-1 and for maximizing passive transfer of antibody from breeder to progeny may be higher.
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