Yellow liver is a reversible anomaly that meat inspectors of sanitary service point out in broiler slaughtering which is getting more frequent during the summer season. The liver show an increase in its size, sometimes haemorrhagic spots and a yellow colour that looks like that of fatty liver. This kind of anomalyhas been correlated to an inadequate time of feed withdrawal. An experiment was carried out to evaluate the effect of a prolonged time of feed withdrawal on liver appearance (colour), weight and fatty acids composition. In this regard an homogeneous batch of male broilers, forty-six days old, has been split into nine groups slaughtered every three hours of feed withdrawal. The colour of the liver, yellow at low time of feed withdrawal, turned to red at the longer time of feed withdrawal. The composition of liver fatty acids showed a marked reduction in the oleate content as feed withdrawal time raising, while a few polyunsaturated long chain fatty acids like arachidonate, eicosapentanoate and docosahexanoate, showed higher levels as feed withdrawal time rising. By Italian law, DPR n° 495 - 10/12/1997 (92/116/UE), meat that shows such kind of anomaly cannot be used as food for human.
L'importanza della durata del digiuno pre-macellazione in relazione al colore ed alla composizione in acidi grassi del fegato di broiler
NOVELLI, ENRICO
2000
Abstract
Yellow liver is a reversible anomaly that meat inspectors of sanitary service point out in broiler slaughtering which is getting more frequent during the summer season. The liver show an increase in its size, sometimes haemorrhagic spots and a yellow colour that looks like that of fatty liver. This kind of anomalyhas been correlated to an inadequate time of feed withdrawal. An experiment was carried out to evaluate the effect of a prolonged time of feed withdrawal on liver appearance (colour), weight and fatty acids composition. In this regard an homogeneous batch of male broilers, forty-six days old, has been split into nine groups slaughtered every three hours of feed withdrawal. The colour of the liver, yellow at low time of feed withdrawal, turned to red at the longer time of feed withdrawal. The composition of liver fatty acids showed a marked reduction in the oleate content as feed withdrawal time raising, while a few polyunsaturated long chain fatty acids like arachidonate, eicosapentanoate and docosahexanoate, showed higher levels as feed withdrawal time rising. By Italian law, DPR n° 495 - 10/12/1997 (92/116/UE), meat that shows such kind of anomaly cannot be used as food for human.Pubblicazioni consigliate
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