Muscle degeneration in chicks caused bySenna occidentalisseeds

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Abstract
Acute intoxication with Senna occidentalis seeds was studied in chicks. Seven‐day‐old chicks were fed ground dried seeds of this plant mixed with regular chicken ration at a concentration of 4% by weight for 15 days. Feed intake and body weight were markedly affected and a high level of lethality was observed. Necropsy examination of chicks from the experimental group revealed paleness and atrophy of thoracic muscles. Degenerative and necrotic fibres were observed in skeletal muscle by histological examination. Muscle histochemistry showed accumulation of lipids and numerous acid phosphatase‐positive muscle fibres. Electron microscopy revealed atrophic muscle fibres, lipid storage, dilatation of the sarcoplasmic reticulum and abnormal mitochondria.