Dynamics of Macrophages in Laying Hens during Second and Third Production Cycles after Zinc Induced Molting

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The influence of a non-feed removal molting program on certain parameters of cell mediated and humoral immune response of the laying birds during 2<SUP>nd</SUP> and 3<SUP>rd</SUP> production cycles were recorded. Birds at the end of their 1<SUP>st</SUP> production cycle were induced to molt through the supplementation of high dietary zinc oxide (3000mg/Kg) for their 2<SUP>nd</SUP> and 3<SUP>rd</SUP> production cycles. Macrophage engulfment (%) and engulfment/cell were significantly increased after the use of opsonized sheep red blood cells (SRBC) for co-incubation during 2<SUP>nd</SUP> production cycle. Lipopolysacchrides (LPS) greatly enhanced the production of nitric oxide, as compared to the SRBC stimulation during the 2<SUP>nd</SUP> production cycle. Zinc feeding strengthened the antibody response against Newcastle disease virus (NDV) and egg drop syndrome virus (EDS) at the peak of the 2<SUP>nd</SUP> and 3<SUP>rd</SUP> production cycles, but decreased at 5% production stages. NDV also provoked a better antibody response when compared to EDS. Zn concentration in plasma showed a positive correlation with an increase in egg production. Our results validate the strengthened immune response during the 2<SUP>nd</SUP> production cycle after zinc-induced molting.

収録刊行物

  • The journal of poultry science  

    The journal of poultry science 43(3), 286-295, 2006-07-25 

    日本家禽学会

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各種コード

  • NII論文ID(NAID)
    10018180389
  • NII書誌ID(NCID)
    AA11564513
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13467395
  • NDL 記事登録ID
    7990732
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-J694
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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