Influence of bacterial organic selenium on blood parameters, immune response, selenium retention and intestinal morpholo
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RESEARCH ARTICLE
Open Access
Influence of bacterial organic selenium on blood parameters, immune response, selenium retention and intestinal morphology of broiler chickens A. M. Dalia1,2, T. C. Loh1, A. Q. Sazili1 and A. A. Samsudin1*
Abstract Background: Several studies indicated that dietary organic selenium (Se) usually absorbed better than an inorganic source, with high retention and bioavailability. Dietary Se as an antioxidant element affects the immune system and hematological status in animals. Therefore, the aim of this study was to evaluate the effect of dietary supplementation of bacterial selenium as an organic source on hematology, immunity response, selenium retention, and gut morphology in broiler chickens. Results: The present results revealed that supplementation of inorganic Se was associated with the lowest level of RBC, HB, and PCV with significant difference than ADS18-Se. In the starter stage, both T2 and T5 were associated with the significantly highest IgG level compared to the basal diet, while all supplemented groups showed higher IgM levels compared to the control group. In the finisher phase, all Se supplemented groups showed significant (P ˂ 0.05) increases in IgG, IgA, and IgM levels compared to T1. Birds fed bacterial-Se showed high intestinal villus height and better Se retention more than sodium selenite. The organic selenium of ADS18 had a superior action in improving Se retention compared to ADS1 and ADS2 bacterial Se. Conclusions: Bacterial organic Se had a beneficial effect on the villus height of small intestine led to high Se absorption and retention. Thus, it caused a better effect of Se on hematological parameters and immunity response. Keywords: bacterial Selenium, retention, immunity, hematology, gut morphology, broiler
Background Selenium (Se) is a structural component of at least 25 selenoproteins that contribute in a regulation of various biological functions in the body. Recent studies are converted from focusing on Se toxicity to its essential nutritional effects. A huge number of studies were carried out to evaluate the effects of Se on poultry nutrition and * Correspondence: [email protected] 1 Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia Full list of author information is available at the end of the article
biological functions, and rapid discoveries were made to reveal the proper source of Se and the optimal level that must be added to the poultry diet. Selenium absorption and retention in the body depend mainly on the ingested form [1]. All recent studies demonstrated that organic Se is more bioavailable than inorganic forms in poultry nutrition [2, 3]. Organic Se is usually associated with higher absorption and retention compared to the inorganic form [4]. Moreover, organic Se is retained in the muscle tissues more than inorganic Se due to their different absorption pathways. Organic Se retained in a
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