title: Myopathy of the deep pectoral muscle in broiler breeder hens.
abstract: Myopathy of the pectoralis profundus and ambiens muscles was found in chickens from 5 flocks of broiler breeder hens. Histological lesions in the muscles varied from steatosis to loss of striations, fragmentation of fibers, and mineral deposition. A clinical response followed oral medication with vitamin E and selenium although analysis showed that selenium and vitamin E levels in the feed were normal. The possible relation between myopathy and Cassia seed in the feed is discussed.
mesh_terms: D000818:Animals; D002645:Chickens; D005260:Female; D009135:Muscular Diseases / Q000473:pathology / Q000662:veterinary*; D010369:Pectoralis Muscles / Q000473:pathology; D011201:Poultry Diseases / Q000473:pathology