دراسة مقارنة تأثير استخدام المضاد الحيوي (الأوكسي تتراسايكلين) والمعزز الحيوي العراقي وخليطيهما كإضافات غذائية في علائق فروج اللحم في :II بعض المعايير الكيموحيوية والمناعية.

Abstract

AbstractThis study was carried out in commercial chicken farm during aperiod November 12th 2007 to January 7th 2008. to evaluate the effect ofusing antibiotic (oxytetracyclin) at level (5.5mg/kg feed) and Iraqi probioticat level (5g/kg feed) and their combination on some biochemical andimmunological parameters for broiler chicks. A total of two hundred andfourty, one day old un sexed broiler chicks were used in this study. Thesechicks were distributed randomly into four treatment groups. (60 chicksper each) with two replicates for each treatment (30 chicks per each).1- Control group :fed on basal diet free from any addition.2- Antibiotic group: fed on the same diet supplemented with 5.5 mgoxytetracycline/kg feed.3- Probiotic group :fed on the same basal diet supplemented with 5gprobiotic/kg feed.4- Combination group: fed on the same basal diet supplemented with5.5mg (oxytetracycline) plus 5g probiotic /kg feed.The biochemical parameters includes total protein, cholesterol,calcium, phosphorus and alkaline phosphatase in blood serum and ashpercentage in bones while the immunological parameters includes therelative weight of bursa fabricia, index of bursa fabricia andheterophile/lymphocyte ratio(H/L).The results of this study showed that superior the probiotic group inmost biochemical parameters for serum and bone, and decrease incholesterol concentration as compared with the other treatment groups.While the probiotic group revealed significant improvement in relativeweight and index of bursa fabricia and decrease in H/L.