X線CTを用いたブロイラーにみられる脊椎膿瘍の感染経路の検討  [in Japanese] Computed Tomographical Examination of Infectious Route of Thoracic Vertebral Abscesses in Broiler Chickens  [in Japanese]

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Abstract

ブロイラーでみられる脊椎膿瘍の感染経路を解明する目的で,鶏の脊椎に分布する気囊を探索した.岩手県内のブロイラー農場で出荷直前に自主廃棄された44~52日齢のブロイラー12例(A群)と,初生で導入し74日齢まで飼育したブロイラー2例(B群),成鶏のP2系白色レグホン種2例(C群)を用いて,X線CT検査及び病理学的検索を行った.A群とB群では,頸椎から第三胸椎までの椎体が含気骨を呈しており,第四胸椎以降では含気領域は認められなかった.C群では頸椎から仙椎までほとんどの椎体で含気領域が認められた.A群でみられた脊椎膿瘍の症例では,CT検査によっておもに第六胸椎の椎体構造の破壊がみられ,それらは肉眼的及び病理組織学的検索でも確認されたが,いずれも第六胸椎の椎体に含気領域は認められなかった.これらの検索結果より,本症の感染経路は気囊を介した経気道感染の可能性は低いことが示唆された.

This study was conducted to reveal the infectious route of vertebral abscesses in broiler chickens. Twelve broiler chickens before shipment for meat inspection (Group A), two 74-day-old chickens (Group B) and two adult white leghorn chickens (Group C) were used. The air sacs of the chickens were examined using X-ray computed tomography (CT), and then the chickens were pathologically examined. Most of the vertebrae of group C showed pneumatization, while the pneumatization of groups A and B was restricted to between the cervical and third thoracic vertebrae. No pneumatization was recognized at the sixth thoracic vertebrae for groups A and B, although this vertebra was destroyed by vertebral abscesses, and this was confirmed by CT and pathological examinations. Therefore, it is suggested that the infectious route for the vertebral abscesses was unlikely to be through air sac infection.

Journal

  • Journal of the Japan Veterinary Medical Association

    Journal of the Japan Veterinary Medical Association 67(11), 839-843, 2014

    Japan Veterinary Medical Association

Codes

  • NII Article ID (NAID)
    130004888048
  • NII NACSIS-CAT ID (NCID)
    AN00191857
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    0446-6454
  • NDL Article ID
    025908450
  • NDL Call No.
    Z18-352
  • Data Source
    NDL  J-STAGE  JASI 
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