[Pathomorphology of the skeletal musculature of swine dying during transportation].
Pathomorphological studies were conducted into seven different muscles of 50 pigs that had died on transport to slaughterhouses. Established was the following percentual presence of acute disseminated hyaline-plaque degeneration and necrosis of muscle fibres: Group 1 with high frequency of pathological findings: M. biceps femoris, bright portion positively affected in 72 per cent of all cases, dark portion in 68 per cent; M. semimembranosus affected in 64 per cent; M. longissimus dorsi affected in 56 per cent. Group 2 with low to medium frequency of pathological findings: M. Quadriceps femoris affected in 26 per cent; M. semitendinosus, bright portion affected in 26 per cent, dark portion in 16 per cent; M. psoas major affected in 18 per cent. Group 3 without myopathy frequency: M. masseter. The rare occurrence of resorptive myositis (between zero and six per cent of all cases, depending on affected muscles) seems to confirm the young age of that myopathy which usually develops only under transport stress. Hyaline transverse ligaments (supercontractures) were not observed at all in the context of transport deaths (M. longissimus dorsi, M. biceps femoris--bright portion, M. semitendinosus--bright portion, M. masseter) or only in rare cases (M. quadriceps femoris in two per cent of all cases, M. semimembranosus in six per cent, M. semitendinosus--dark portion in six per cent, M. biceps femoris in 18 per cent, M. psoas major in 24 per cent). A comparison with earlier results on the frequency of muscle damage showed that hyaline-plaque degeneration and necrosis of muscle fibres occurred much more often in the context of normal slaughter without any transport and with much graver severity following different modes of transport. These conclusions and results are all relating to pigs which died on transport. The results are discussed, with reference to aetiology and pathogenesis of myopathies in swine caused by stress.
D000818:Animals; D001344:Autopsy / Q000662:veterinary; D009132:Muscles / Q000473:pathology*; D009220:Myositis / Q000473:pathology / Q000662:veterinary; D009336:Necrosis; D013552:Swine; D013553:Swine Diseases / Q000473:pathology*; D014186:Transportation
Untersuchungen zur Pathomorphologie der Skelettmuskulatur bei Schweinen mit Transporttod.