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牛コクシジウム症:アルゼンチン中部のレトロスペクティブ研究
E J Vilatuña1, G Cantón1, M F Ovelar1
1Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS) (INTA EEA Balcarce-CONICET), RN 226 Km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
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まとめ
牛コクシジウム症は、寄生性の胃腸疾患であり、アルゼンチンの子牛に頻繁に影響を与え、しばしばストレスの多い管理に関連しています。この研究は、その蔓延と病理学を強調し、制御戦略に役立ちます。
科学分野:
- 獣医寄生虫学、動物病理学、疫学
背景:
- 牛コクシジウム症は、アイメリア種によって引き起こされる、牛の重大な世界的な胃腸疾患です。主に子牛に影響を与え、ストレスの多い管理慣行によって悪化し、牛の生産に経済的損失をもたらします。熱帯/亜熱帯地域では一般的ですが、他の地域での疫学についてはさらなる調査が必要です。
研究 の 目的:
- アルゼンチン中部の牛コクシジウム症発生の記録と分析。これらの発生に関連する疫学的要因、臨床兆候、および病理学的所見の調査。アイメリア種および胃腸線虫との同時感染の特定。
主な方法:
- INTAバルカルセの獣医専門診断サービス(SDVE)に記録された63件の牛コクシジウム症発生のレトロスペクティブ分析。疫学的データと臨床兆候の収集。43件の剖検および組織病理学的評価が実施されました。糞便サンプルの卵嚢数(アイメリア属)および線虫卵数の分析。
主要な成果:
- 発生は年間を通じて見られ、秋にピークを迎え、主に牛と子牛のシステムで、12ヶ月未満の子牛に影響を与えました。一般的な引き金には、離乳、輸送、過密が含まれていました。罹患率は平均5.6%、死亡率は平均2.6%でした。臨床兆候には、血性の下痢と神経学的兆候が含まれていました。組織病理学的検査により、Eimeria zuerniiとE. bovidの感染が確認されました。
結論:
- 牛コクシジウム症はアルゼンチン中部に広く蔓延しており、しばしば不十分な飼養管理状況に関連しています。この研究は、この地域における疾患の疫学と病理学に関する重要な洞察を提供します。調査結果は、牛の生産システムにおける診断方法と制御戦略の改善に役立ちます。
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