Potential for disruption of central nervous system tissue in beef cattle by different types of captive bolt stunners.
The application of pneumatic-powered air injection stunners (PPAISs), pneumatic-powered stunners (PPSs), and cartridge-fired stunners (CFSs) in commercial beef slaughter plants was evaluated to determine the extent of dissemination of central nervous system tissue.
Fifteen beef slaughter plants in the western and central United States were visited to observe stunning methods and the condition of the hearts at postmortem inspection.
As inspectors performed the normal opening of the hearts, the research observer evaluated the contents of the heart for the presence of clots and/or visible tissue segments in the right ventricle.
In eight plants where PPAISs were used, 33% of hearts examined (n=1,050) contained large clots in the right ventricles.
In the four plants where CFSs were used, 1% of the hearts (n=480) contained detectable clots.
In three plants where the newly modified PPSs were used, 12% of the hearts (n=450) contained detectable clots.
Large segments of spinal cord were detected, collected, photographed, and confirmed histologically from two hearts in a plant that used a PPAIS.
Most of the material was found in a single right ventricle and was composed of 10 to 13 cm segments of spinal cord.
Mots-clés Pascal : Moelle épinière, Coeur, Abattoir, Assommage, Système nerveux central, Disruption, Bovin boucherie, Artiodactyla, Ungulata, Mammalia, Vertebrata, Caillot, Embolie cérébrale, Histologie, Encéphalopathie spongiforme, Technique ELISA, Ventricule droit, Infection
Mots-clés Pascal anglais : Spinal cord, Heart, Slaughterhouse, Stunning, Central nervous system, Disruption, Beef cattle, Artiodactyla, Ungulata, Mammalia, Vertebrata, Clot, Cerebral embolism, Histology, Spongiform encephalopathy, ELISA assay, Right ventricle, Infection
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0334352
Code Inist : 002A35B05. Création : 16/11/1999.