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Articles by F.S.A. Ismail
Total Records ( 6 ) for F.S.A. Ismail
  F.S.A. Ismail , M.R. El-Gogary and M.I. El-Nadi
  The present study was carried out to investigate the effects of dietary supplementation with vitamin E and stocking density on performance, thyroid function, plasma concentration of corticosterone (Cort), some blood parameters, (antibody (Ab) titers against Newcastle Disease Virus (NDV) and Avian Flu virus (AF)) and antioxidant status in broiler chickens. In all 192; 3-day-old commercial broiler chickens (cobb 500) were randomly divided into 8 treatments groups, each of which include 4 replicates. Experimental treatments consisted of a 4x2 factorial arrangement design with 4 levels of vitamin E and 2 levels of stocking density (11.90 birds m-2 as the normal stocking density or 16.66 birds m-2 as the high stocking density). Vitamin E levels were 0.0, 200, 300 and 400 mg kg-1 diet. Increasing vitamin E level in the diet did not affect Live Body Weight (LBW), Body Weight Gain (BWG), feed intake and FCR. Also, increasing vitamin E levels had no effects on T4, Total Lipids (TL), total cholesterol (Chol) and high density lipoprotein cholesterol (HDL). However, supplementing vitamin E had a significant effect on SOD, NDV and AF titers but decreasing effect on MDA. In addition, plasma Cort and LDL levels were lower at 300 mg kg-1 vitamin E supplementation but plasma Total Protein (TP) and albumin (Alb) levels were higher at 300 mg kg-1 vitamin E supplementation. The normal stocking density has significant effects on LBW, BWG, FI, Cort, TP, TL and chol compared with the high stocking density. However, stocking density did not affect FCR, T3, T4, Alb, LDL, HDL and SOD. The results of the present study show that supplementing of vitamin E at 300 mg kg-1 of diet has a positive effect on productivity, immunity and blood parameters in broiler chickens.
  M.H. Rabie , F.S.A. Ismail , R.A. Hassan and Ebtehal A.H. Abo Ahmed
  The present study was conducted to determine the effects of single and combined addition of Citric Acid (CA) and Microbial Phytase (MP) on performance, egg quality and mineral utilization of hens fed graded levels of nonphytate phosphorus (NPP). The NPP levels were 0.40, 0.30 and 0.20% without and with MP (0.05%), CA (2.0%) or both. Twelve groups of both 28 weeks old hens and cockerels were fed their respective experimental diets. Criteria evaluated were feed intake, egg production, egg weight, egg mass, feed conversion ratio, egg components, shell thickness, Haugh units, yolk index, tibia ash, tibia Ca, P, Mg, Cu and Zn and apparent retention of these minerals. Feeding the 0.2% NPP diet adversely affected (p<0.01) egg production, egg weight, feed intake, egg mass, feed conversion, percent eggshell, yolk index, shell thickness, tibia ash content and retention of Cu and Zn compared with their positive control. Although birds fed 0.3% NPP gave comparable performance and egg quality to their positive controls, tibia bone ash, tibia contents of Ca and P and retention of P, Cu and Zn of the former were significantly lower than the latter. The poor productive performance and egg quality due to feeding 0.2% NPP diet were completely corrected by MP but CA was not effective. Added MP can effectively prevent the reductions in performance and egg quality and either microbial phytase or citric acid may partially alleviate the depression of mineral utilization in birds fed the low NPP diets, without a synergistic positive effect for their combination.
  M.H. Rabie , F.S.A. Ismail and A.A.S. Ahmed
  An experiment was conducted to investigate the effect of in ovo L-carnitine injection at three incubational ages on hatchability of broiler breeders and post-hatch performance. Four doses of L-carnitine (0.0, 4, 8 and 12 mg/100 μL) were injected into fertile eggs at days 14, 16 and 18 of incubation. Hatched chicks were individually weighed and fertile hatchability was calculated. Birds were kept in batteries and fed common starter and grower diets. Means of weight gain, feed intake and feed conversion were estimated. Mortality was also monitored. A slaughter test was made to evaluate the relative weights of carcass yield, front and hind parts and the edible organs. No deaths occurred during a 7-week feeding trial. Hatchability was unaffected by the injected dose of L-carnitine but it significantly improved when eggs were injected on day 14 of incubation compared with those injected on days 16 or 18. Although, total feed intake of chicks was not affected by in ovo L-carnitine injection, cumulative weight gain was positively affected. Birds hatched from eggs that were injected with L-carnitine at 8.0 or 12.0 mg/100 μL achieved significantly better feed conversion compared with the control group. Injection with 12.0 mg/100 μL positively affected the percentages of front parts but decreased those of liver and gizzard and had no effect on other traits examined. It is concluded that in ovo L-carnitine injection is beneficial for hatchability on day 14 while its injection at 8.0 mg/100 μL on day 16 of incubation is advantageous to subsequent performance.
  F.S.A. Ismail , Hayam M.A. Abo El-Maaty , M.H. Rabie and A.Q. Aswad
  A 12-week study was conducted to evaluate the productive performance of Bovans White laying hens fed high-nutrient-density diets under Egyptian summer conditions. Two hundred hens were randomly assigned to five equal dietary treatments, five replications each. Birds were kept at community cages in an open-sided laying house, provided with a daily photoperiod of 16 h and managed similarly. A control diet was formulated (as fed basis) to contain a metabolizable energy of 2880 kcal kg–1, 17.40% crude protein, 4.35% Ca, 0.43% nonphytate P, 0.84% lysine, 0.41% methionine and 0.70% methionine plus cysteine. Four high nutrient density diets were also compounded to contain 102.5, 105, 107.5 and 110% of the nutrients present in the control diet, thus five mash diets were composed and used from 44-56 weeks of age. The criteria of response were feed intake, egg production, egg weight, egg mass, feed conversion, body weight change, egg components and certain traits of egg quality, nutrient digestibility and some blood plasma parameters. Feeding the high nutrient density diets exerted no positive effect on productive performance of hens, digestibility of nutrients (dry matter, organic matter, crude protein, ether extract, crude fiber, nitrogen-free extract and ash retention), some egg quality traits and most blood parameters examined but positively affected weight change, percent albumen, shell thickness, yolk index and Haugh units. It is concluded that increasing dietary nutrient density up to 110% of the recommended requirements of Bovans White laying hens does not improve their productive performance under Egyptian summer conditions.
  M.R. EL-Gogary , F.S.A. Ismail , Kh.El. Sherif and S.A. Tuama
  Objective: The objective of this study was to examine the effects of Nutrient Density (ND) and physical form. Materials and Methods: A 5x2 factorial arrangement was used with five dietary nutritional densities and two physical forms (mash and pellets) on production characteristics, hormone function, antioxidant enzyme and fatty acids profile of broilers. Dietary treatments were formulated to contain recommendation of broiler chicks (control), two high levels (H1 and H2) and two low levels (L1 and L2) from ME, crude protein and amino acid (methionine and lysine) densities that were fed from 1-49 days of age. Results: Feeding the low nutritional density diets (L1 and L2) produced significantly better means of LBW, BWG, FI and FCR as compared to other groups. The FI and FCR for birds fed on mash were superior and significant for others fed pellet diets. Low nutritional density was highest concentration of T4, T3 and IGF-1 levels. In addition, there was no significant effect on MDH. However, nutritional density significantly increase SOD and catalase with low levels and high levels of nutritional density compared to the control group. Fatty acids profile of blood plasma in broiler chicks showed inconsistent trend especially when both total unsaturated fatty acids to saturated fatty acids and omega-6 to omega-3 ratios are considered. This difference is a reflection of the higher levels of both dietary levels of crude protein, added vegetable oils, lysine and methionine levels in the diets. Conclusion: The present results indicate that it is possible to reduce low nutritional density without any detrimental impact on growth performance.
  M.R. El- Gogary , F.S.A. Ismail and M.I. El- Nadi
  This study was undertaken to evaluate the effect of dietary supplementation with Vitamin E (VE) and stocking density on growth performance and histological responses of broiler chicks. Cobb-500 3 day old chicks were randomly distributed to eight equal groups, each of which contained four replications. An experiment with a factorial arrangement of treatments (4x2), 4 levels of VE (0.0, 200, 300 and 400 mg kg-1 diet) and 2 levels of stocking density (11.9 birds m-2 as the normal stocking density or 16.66 birds m-2 as the high stocking density). Apart from the effect of stocking density, dietary supplementation with VE did not affect Live Body Weight (LBW), Body Weight gain (BW), Feed Intake (FI), Feed Conversion Ratio (FCR), carcass traits or lymphoid organs examined. The high stocking density had a negative effect on LBW, BWG and FI but FCR and carcass traits were not affected compared with the normal stocking density, irrespective of the effect of added VE. Dietary supplementation with VE enhanced the activity of spleen, bursa and thymus to produce many lymphocytes that help improving the immunity of birds. The high stocking density, applied herein, exerted a negative effect on the histology of lymphoid organs which may cause low immune responses. The results of the present study shown that supplemental dietary VE could improve the histological responses of lymphoid organs in broiler chickens.
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