鶏のくる病および過剰な食事性カルシウムとリンに関連する転移性石灰化

Peter M O'Kane¹, Allan R Ball², Carlo Bianco³

¹Slate Hall Veterinary Services, Moorlands Trading Estate, Lincoln LN4 3HX, United Kingdom, petermokane@yahoo.co.uk.

Avian diseases

|February 25, 2026

まとめ

ブロイラーの早期発症性くる病および内臓石灰化は、過剰な食事性カルシウムとリンに関連していました。この栄養失調は、若鶏に重度の跛行、成長不良、高い死亡率を引き起こしました。

科学分野:

鳥類病理学
家禽栄養学
獣医学

背景:

7日齢の英国のブロイラーで、死亡率と間引き率の上昇が観察された。
臨床兆候には、衰弱、跛行、湿った敷料が含まれていた。

研究の目的:

ブロイラーの早期発症性跛行および死亡の原因を調査する。
根本的な病態および寄与する栄養要因を決定する。

主な方法:

罹患した雛の剖検および組織病理検査。
サンプルの細菌学的検査。
スターター飼料の飼料分析。

主要な成果:

組織病理検査により、脛骨軟骨異形成症および骨異栄養症が明らかになった。
砂嚢、腎臓、前胃に石灰化が認められた。
飼料分析により、比率の不均衡を伴う過剰なカルシウムとリンのレベルが示された。

結論:

本症例は、転移性内臓石灰化を伴う早期くる病として提示された。
スターター飼料の栄養失調が主な原因であった。
これらの所見は、高い死亡率と間引き率と関連していた。

キーワード:

ブロイラー跛行転移性石灰化くる病

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