Yüksek düzeyde tahıl içeren rasyonlarlarla beslenen besi sığırlarında görülen karaciğer apseleri

Besi sığırlarında görülen karaciğer apsesi yüksek oranda tahıl içeren rasyonlarla beslemede ortaya çıkar. İnsidansı bakım ve beslenme şartlarına bağlı olarak ortalama %12-32’dir. Karaciğer apseleri büyük ekonomik kayıplara yol açar ve yem tüketimi, canlı ağırlık artışı, yemden yararlanmayı azaltır ve karkas kalitesini düşürür. Rumende bulunan anaerobik Fusobacterium necrophorum, karaciğer apsesinden birinci derecede sorumlu etiolojik ajandır. Actinomyces pyogenes ikinci derecede izole edilen patojen ajandır. Asidozisin neden olduğu ruminal lezyonlar karaciğer apsesinin predispoze faktörüdür. Ruminal epitele kolonize olan F. necrophorum karaciğere geçerek enfeksiyona neden olur. Karaciğer apsesine karşı korunmada antimikrobiyal yem katkı maddeleri kullanılır

Anahtar Kelimeler:

Besi sığırı, tahıl, karaciğer apsesi

Liver abscesses in beef cattle feed diets containing high levels of grains

Liver abscesses in slaughtered beef cattle result from aggressive grain-feeding programs. The incidence, averaging from 12 to 32% in most beef cattle, is influenced by a number of dietary and management factors. Liver abscesses represent a majör economic liability. Besides liver condemnation, economic impact include reduced feed intake, reduced weight gain, decreased feed effıciency, and decreased carcass yield. Fusobacterium necrophorum, a member of the ruminal anaerobic bacterial flora, is the primary etiologic agent. Actinomyces pyogenes is the second most frequently isolated pathogen. Ruminal lesion resulting from acidosis generally are accepted as the predisposing factors for liver abscesses. F necrophorum possesses or produces a number of virulence factors that participate in the penetration and colonization of the ruminal epithelium and subseçuent entry and establishment of infection in the liver. Control of liver abscesses in beef cattle generally has depended on the use of antimicrobial compounds

Keywords:

Beef cattle, grain, liver abscesses,

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