Abstract
ABSTRACTAs part of a continuing study to define the etiology of porcine stress syndrome and pale, soft, exudative pork, cyclic AMP (c‐AMP) levels in longissimus muscle from stress susceptible (SS) and control (C) pigs were compared. At 3 min postmortem, levels of c‐AMP were significantly higher for SS than for C pigs; thereafter differences were not significant. Variations in initial levels of glycogen affected lactate, pH and color of the postmortem muscles but did not affect c‐AMP levels. Initial levels of glycogen were higher for SS pigs killed in the morning than for those killed in the afternoon. Results of this study indicate that further study, using greater numbers of pigs, is warranted to establish whether the 3 min postmortem level of c‐AMP can be used as an objective measure of stress susceptibility.
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