30 Jun 2021

Dorsal Cranial Myopathy in broiler meat

Dorsal Cranial Myopathy is a chronic degenerative myopathy that affects the anterior latissimus dorsi, a pair of muscles located in the back of the bird.

Dorsal Cranial Myopathy in broiler meat

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  • Dorsal Cranial Myopathy – DCM is a chronic degenerative myopathy that affects the anterior latissimus dorsi, a pair of muscles located in the back of the bird.
  • Serious forms of DCM are condemned, with economic losses for companies.

Dorsal Cranial Myopathy – DCM has been described for the first time by Dr. FC Zimmerman in her master’s thesis at the Federal University of Rio Grande do Sul, Brazil, in 2008, thus opening the eyes of the industry to myopathy more.

 

DCM affects one or both of the anterior latissimus dorsi muscles – ALD. Equivalent to the trapezius muscles in humans, ALDs originate in the mid-dorsal thoracic line and attach to the humerus, and their primary function is to keep the wings raised and attached to the body of the bird.

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calidad canal pollosThe DCM causes the skin that covers the cranial region of the ALD to bulge and acquire a coloration ranging from a slight yellowish to red depending on the severity of the injury. Subcutaneous examination of the bulging area may show the presence of edema, superficial muscle petechiae, paleness, adhesions, and in the most severe cases, increased thickness and density of the muscle, and necrosis. As in other myopathies, heavy and rapidly developing males are the most susceptible to DCM.

Because it is externally visible, the DCM, in its most serious forms, is confiscated during the inspection, inflicting damage on the industry. In Brazil, condemnation due to myopathy averages 0.5% of the slaughter, according to data from the Federal Inspection Service – SIF, with a loss of 50g to 180g of meat per carcass seized, according to authors.

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