Evaluation of muscle tissue and liver glycogen of cattle submitted to transport over long distances and subjected to emergency slaughter
AUTOR(ES)
Burns, L.V.
FONTE
Arq. Bras. Med. Vet. Zootec.
DATA DE PUBLICAÇÃO
14/06/2019
RESUMO
RESUMO O presente trabalho objetivou avaliar o efeito do transporte em longas distâncias sobre o tecido muscular de bovinos encaminhados ao abate de emergência. Foram avaliados pH, glicogênio muscular e hepático, análise histopatológica muscular, creatina quinase (CK), alanina aminotransferase (ALT) e aspartato aminotransferase (AST). Os animais foram alocados em dois grupos: grupo experimental (GE), constituído por 19 bovinos destinados ao abate de emergência, e grupo controle (GC), composto por 24 bovinos abatidos de acordo com o fluxo normal do frigorífico. A CK e a ALT estavam aumentadas no GE. O AST não diferiu entre os grupos. O GE apresentou maior percentual de fibras degeneradas, e o músculo intercostal teve maior quantidade de degenerações. O pH muscular foi superior no GE. O glicogênio muscular e o hepático não diferiram entre os grupos. Concluiu-se que bovinos encaminhados ao abate de emergência sofrem estresse severo pelo transporte por longas distâncias, com alterações bioquímicas no tecido muscular determinada pela degeneração celular.ABSTRACT The study evaluated the effect of transportation over long distances on cattle muscle tissue of submitted to emergency slaughter in slaughterhouses in northern Tocantins, Brazil. The evaluations consisted in pH, muscle and liver glycogen, muscle histopathology and creatine kinase (CK), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activity. Animals were placed into two groups: Experimental Group (EG), consisting of 19 bovines intended for immediate emergency slaughter, and Control Group (CG), composed of 24 bovines slaughtered in accordance with the normal flow. CK and ALT levels were high in EG. AST did not differ between groups. EG showed higher muscle pH and mean of degenerate fibers, mainly on the intercostal. However, muscle and liver glycogen did not differ between groups. In conclusion, cattle transported over long distances and subjected to immediate emergency slaughter showed markedly stress condition, with changes in biochemical parameters in the muscle tissue, determined by cellular degeneration.
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