Dystrophy of the diaphragmatic muscles in Holstein-Friesian steers.
Diaphragmatic muscles in two slaughtered Holstein-Friesian revealed slightly pale color, swelling, and stiffness on palpation. Histologically the muscle fibers showed internal nuclei, fiber-splitting, variation in diameter, central core-like structures, sarcoplasmic masses, and vacuolar degeneration. These lesions were the same as those in dystrophy of the diaphragmatic muscles in Holstein-Friesian cows. It was demonstrated that muscular dystrophy of the diaphragm in Holstein-Friesian cattle occurred also in males, probably by inheriting an autosomal recessive trait.
Nakamura
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N
Obihiro Meat Inspection Office, Hokkaido, Japan.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D003964:Diaphragm / Q000473:pathology*; D008297:Male; D018485:Muscle Fibers, Skeletal / Q000473:pathology; D009137:Muscular Dystrophy, Animal / Q000473:pathology*