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Year : 2011
Tome : 162
Volume : 6
Pages : 279-283
Title : Deep pectoral myopathy: prevalence in 7 weeks old broiler chickens in Bulgaria
Authors : I. DINEV, D. KANAKOV
Summary : The purpose of the study was to investigate the prevalence of DPM (deep pectoral myopathy) in young broiler chickens according to their live weight during slaughtering inspection. Chickens (Ross 308 and Cobb 500) reared under intensive conditions and slaughtered on 7 weeks of age were allotted in 2 flocks of 20 000 birds each, named flock A and flock B, according to the ratio live weight / carcass weight (2.3/1.7 and 2.6/1.9, respectively). During deboning of the breast muscles, samples showing gross lesions of the m. supracoracoideus were collected and a conventional histology was performed. The overall DPM prevalence (for the 2 flocks) was 0.51% and the specific prevalence by flock was significantly higher in the flock B (P < 0.01). The frequency of early DPM lesions characterized by an acute inflammatory reaction (oedema, haemorrhages and infiltrate of macrophages and heterophils) coupled to a severe muscle discoid necrosis was significantly higher in the flock A (P < 0.05) whereas the proportion of older lesions in which the affected muscle showing a typical green colour before being replaced by fibrous or adipose tissue was dramatically increased in the heaviest chickens (flock B) (P < 0.001). These results confirm the DPM occurrence in meattype growing birds even in young broilers (7 weeks old).
Keywords : Deep pectoral myopathy, broiler chickens, Bulgaria, histology, acute inflammatory reaction, muscle necrosis
Correspondence : I. DINEV
Adress : Department of General and Clinical Pathology, Faculty of Veterinary Medicine, Trakia University, 6 000 Stara Zagora, BULGARIA - Corresponding author: idinev@uni-sz.bg
Link : pdf

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