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Dynamics of intestinal metabolites and morphology in response to necrotic enteritis challenge in broiler chickens

文献类型： 外文期刊

作者： Wu, Shu-Biao 1 ; Rodgers, Nicholas J. 1 ; Cui, Guimei 3 ; Sun, Yi 3 ; Choct, Mingan 1 ;

作者机构： 1.Univ New England, Sch Environm & Rural Sci, Armidale, NSW, Australia

2.Univ New England, Poultry Cooperat Res Ctr, Armidale, NSW, Australia

3.Shanxi Acad Agr Sci, Biotechnol Res Ctr, Taiyuan, Peoples R China

4.Tegel Foods, Auckland 1023, New Zealand

关键词： Necrotic entertitis;volatile fatty acids (VFAs);metabolites;histomorphometry;intestine;broiler

期刊名称：AVIAN PATHOLOGY （ 影响因子：3.378； 五年影响因子：3.237 ）

ISSN：

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收录情况： SCI

摘要： Despite the relatively small contribution to metabolizable energy that volatile fatty acids (VFAs) provide in chickens, these organic acids have been reported to play beneficial roles in the gastrointestinal tract (GIT) of birds, for example, inhibition of the growth of some pathogenic bacteria. However, information regarding the dynamics of these metabolites in the GIT of chickens is still scarce, especially under disease conditions such as necrotic enteritis (NE). Here, we investigated the dynamics of VFAs and lactic acid, and intestinal morphology in response to NE predisposing factors, that is, excessive dietary fishmeal and Eimeria inoculation, and causative agent Clostridium perfringens producing NetB toxin. The experiment was designed in a 2 x 2 x 2 factorial arrangement of treatments with or without: fishmeal feeding, Eimeria inoculation and C. perfringens challenge. The results showed that these factors significantly influenced composition and concentration of VFAs and lactic acids, pH and histomorphometry in one way or another. These changes may be important for the onset of NE or only the synergetic responses to micro environmental stress. Eimeria appeared to be more important than fishmeal in predisposing birds to NE, thus the application of Eimeria in NE challenge provides more consistent success in inducing the disease. The metabolic responses to various adverse factors such as excessive dietary fishmeal and Eimeria infection are complex. Thus, intensive efforts are required to better understand NE so as to achieve the control of the disease in the absence of antibiotics.

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