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Articles by Shaban Rahimi
Total Records ( 3 ) for Shaban Rahimi
  Shaban Rahimi , Zahra Moghadam Shiraz , Taghi Zahraei Salehi , Mohammad A. Karimi Torshizi and Jesse L. Grimes
  Salmonella enteritidis (SE) colonizes the intestinal tract of poultry and causes food born illness in humans. Reduction of (SE) colonization in the intestinal tract of poultry reduces potential carcass contamination during slaughter. The purpose of this study was to investigate the effect of SE-specific yolk immunoglobulin (IgY) on prevention of SE colonization in orally infected broiler chickens. Commercial Single Comb White Leghorn (SCWL) hens were hyperimmunized with SE whole cell antigens. The presence of anti-Salmonella antibody, IgY and IgG in egg yolk and serum respectively, was monitored by Enzyme Linked Sorbent Assay (ELISA). Two hundred forty male `Ross 308` day old chicks were randomly assigned to 8 groups and 3 replications of 10 birds were grown for 42 days of experiment. Eight experimental groups identified with, S, P, A, SP, SA, AP, SPA, C. Four birds from four challenged groups (S), were orally inoculated with 1 mL of bacterial suspension that contained 1×106 CFU mL-1 S. enteritidis at 3 day of age. The groups that supplemented with antibody (A) received 15 mL of yolk contained antibody mixed per 3.84 mL of drinking water on day 1 and continuing for duration of the experiment. The probiotic treated groups (P) were received probiotic, 0.1% of feed and 0.5% of feed, until day 21 and 56 respectively. One group as control (C) did not received any treatment of probiotic and antibody. A-treated and A-P treated groups had significantly lower fecal shedding (p<0.01) and lower concentration of SE cecal colonization (p<0.01). These groups also had a lower isolation of SE from the liver, spleen and ileum. The use of Salmonella enteritidis-specific IgY combined with probiotic had a beneficial effect in reducing the colonization of Salmonella in market-aged broiler under the condition of this study.
  Shaban Rahimi , Ehsan Salehifar , Seyed Ali Ghorashi , Jesse L. Grimes and Mohammad A. Kaimi Torshizi
  Avian Influenza (AI) is a contagious disease of poultry which caused by type A influenza virus. In the present outbreak of AI in Iran, the isolates (H9N2) were characterized as a low pathogenic form of the virus. Outbreaks due to H9N2 subtypes have been reported in many countries. Because the common methods of control of outbreaks of AI may not be very effective to prevent and control of this disease, we decided to study the effect of egg derived antibody on reducing morbidity and spread of virus in a population of chickens by using so-called transmission experiments. Birds in test group (which received antibody in drinking water) had lower morbidity (p<0.05) and virus shedding compared to the control group. Our experiments demonstrate that administration of egg derived antibody (Ab) to chickens, not only may protect birds against this disease but is also an effective strategy to reduce transmission of AI virus. Therefore, egg derived specific antibody can be an attractive tool to prevent outbreaks of AI viruses in poultry, thereby achieving the aim of eliminating the source of human infections.
  H. Saleh , Shaban Rahimi , M.A. Karimi Torshizi and A. Golian
  A study was conducted to evaluate the effect of Fish Oil (FO) on Fatty Acids (FA) profile and oxidative stability of broiler meat during storage. About 215 days old broiler chicks from a commercial hybrid (Cobb 500) were divided into 12 groups of 18 birds each. Total four diets were provided with of 0.0, 1.5, 3.0 and 6% of fish oil. Each diet was randomly assigned to 3 groups of birds for 42 days. Birds had ad libitum access to feed and water throughout the experiment. Two birds from each replicate were randomly selected and slaughtered on day 42 for meat FA determination. The omega-3 fatty acid profiles Linolenic Acid (LNA) and long chain unsaturated fatty acid, Eicosapentaenoic Acid (EPA), Docosahexaenoic Acid (DHA)) of skinless breast meat and thigh meat were determined. Oxidation stability of samples was determined after storing in -20°C for 1-3 months or in 4°C for 7, 14, 21 and 28 days. Inclusion of FO in the diets significantly (p<0.01) increased LNA, EPA and DHA value in breast and thigh meat. The birds in diet contained 6% fed group had the highest level of n-3 fatty in breast and thigh. Lipid oxidation (malondialdehyde concentration) in breast and thigh meat after storage was higher in birds fed supplemented of FO diet than those fed control diet (p<0.05). These results demonstrated that the supplementation FO in broiler diet may increase long-chain n-3 PUFA content of chicken meat. Supplementation of 3% fish oil led to enrich the meat with n-3 FA with little deterioration of oxidative stability. Addition of >3% FO to diet increased the level of meat n-3 content that was coincided with increase in oxidative susceptibility.
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