Natural plant extracts and prebiotic compounds as alternatives to antibiotics in broiler chicken diets in a necrotic enteritis challenge model

Vidanarachchi, J.K., Mikkelsen, L.L., Constantinoiu, C.C., Choct, M., and Iji, P.A. (2013) Natural plant extracts and prebiotic compounds as alternatives to antibiotics in broiler chicken diets in a necrotic enteritis challenge model. Animal Production Science, 53 (12). pp. 1247-1259.

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An experiment was conducted to determine the effects of two different water-soluble carbohydrate extracts (renga renga lily extract and Acacia extract), and two commercially available prebiotic compounds, Fibregum and Raftifeed-IPE, on the performance of broiler chickens subjected to a necrotic enteritis (NE) challenge model. These treatments were compared with negative control and a positive (Zn-bacitracin) control treatments. An overall 8.8% NE-related mortality was recorded, with mean jejunal and ileal lesion scores in dead birds ranging from 3.03 to 3.90 in all challenged groups except the positive control groups. NE-specific deaths or clinical abnormalities were not observed with unchallenged control and positive control groups. At 7 days post-challenge, the concentration of specific IgY antibodies against the α-toxin of Clostridium perfringens in the serum was lower (P < 0.05) in birds fed the positive control and Fibregum-supplemented diets than in the negative control group. However, birds fed Fibregum had increased (P < 0.05) IgM concentration compared with those fed Acacia extract and lily extract. The Fibregum-fed group also had higher (P < 0.05) IgA concentrations in serum than did the positive-control and lily extract-supplemented groups at 14 days but this effect did not persist to 21 days. The results from the present study demonstrated that supplementation with water-soluble carbohydrates from two plant sources was not effective in controlling NE. However, the prebiotic compound Fibregum was found to be having some immunomodulatory effects. Addition of Zn-bacitracin and monensin was highly effective in counteracting the negative effects of the disease challenge.

Item ID: 29033
Item Type: Article (Research - C1)
ISSN: 1836-5787
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This article has been made open access under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

Date Deposited: 31 Oct 2013 05:14
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070204 Animal Nutrition @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830309 Poultry @ 100%
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