ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2012, Vol. 43 ›› Issue (9): 1463-1470.doi:

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Effects of Dietary Conjugated Linoleic Acid on the Duodenumal Mucosal Immunity
Response and Lipid Peroxidation of Broiler Chicks Infected with E.aceruvlina

LIU Yong-xiang1,2, YANG Jian-ping1,2, JIANG Dong-feng2, LIU Yan-li2, XU Qiu-liang1,2   

  1. (1. Henan Engineering Technology Research Center of Animal Nutrition and Feed, Zhengzhou
    450011, China; 2. Zhengzhou College of Animal Husbandry Engineering,
    Zhengzhou 450011, China)
  • Received:2012-02-21 Online:2012-09-25 Published:2012-09-25

Abstract: The present experiment was conducted to investigate effects of conjugated linoleic acid (CLA) on growth performance, oocyst shedding, duodenumal mucosal immune response and lipid peroxidation of broiler chicks infected with E. aceruvlina. After 21 days of dietary supplementation with either basal diets or 1.5% CLA diets, half of replicates in each treatment were inoculated with 10 000 E. aceruvlina sporulated oocysts. Compared with basal diets, 1.5% CLA diets ameliorated growth inhibition (P<0.01), and decreased oocyst shedding between 6-9 d post-inoculation resulted from E.aceruvlina infection (P<0.01). Whether infection or not, duodenumal intraepithelial lymphocyte (IEL) CD8+T lymphocyte subpopulations were significantly higher in chicks fed CLA diet than the controls (P<0.05), but interferon γ (IFNγ) gene expression was not (P>0.05). Dietary CLA notably suppressed the increase of MDA in duodenumal mucosa (P<0.05), and inhibited the decrease of glutathione (GSH) concentration (P<0.01) resulted from E.aceruvlina infection, but didn’t influence the activity of total superoxide dismutase (TSOD) and catalase (CAT)(P>0.05). Dietary CLA decreased oocyst shedding and ameliorated growth ihibition of broiler chicks resulted from E.aceruvlina infection at least in part through increasing duodenumal IEL CD8+T lymphocyte subpopulations and inhibiting the decrease of duodenumal mucosal GSH in broiler chicks.

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