title: Reduction of stress-induced changes in meat quality with thermolysed brewer's yeast of high nucleotide content in pigs.
abstract: The effect exerted by a biogenic performance enhancer of high nucleotide content on meat quality in 20 Norwegian Landrace pigs (90 to 95 kg) was examined. The diet of the treated group was supplemented with the performance enhancer for the last 30 days of fattening. The stress effect was transport to the slaughterhouse and slaughter itself. Plasma creatine kinase (CK), lactate dehydrogenase (LDH), and aspartate aminotransferase (AST) activities, glucose and cortisol concentrations, and muscle pH were determined. Serious stress damage was found in the cardiac and skeletal muscle, as indicated by the high CK (980 U/L), LDH (> 1600 U/L) and AST (67 U/L) activities in the untreated group; values were significantly lower in the experimental pigs (458, 468 and 17 U/L, respectively). There were no significant differences in glucose and cortisol concentrations between the two groups. In the control group the pH values were significantly lower and more muscle samples showed PSE character than in the treated group (75 and 30%, respectively).
authors.affiliation: Faculty of Animal Science, Pannon Agricultural University, Kaposvár, Hungary.
authors.forename: M
authors.initials: M
authors.lastname: Kovács-Zomborszky
authors.forename: T
authors.initials: T
authors.lastname: Fehér
authors.forename: K
authors.initials: K
authors.lastname: Soós
mesh_terms: D000818:Animals; D001219:Aspartate Aminotransferases / Q000032:analysis / Q000097:blood; D001786:Blood Glucose / Q000032:analysis; D003402:Creatine Kinase / Q000032:analysis / Q000097:blood; D004032:Diet / Q000662:veterinary; D005260:Female; D005527:Food, Fortified; D006854:Hydrocortisone / Q000097:blood; D006863:Hydrogen-Ion Concentration; D007770:L-Lactate Dehydrogenase / Q000032:analysis / Q000097:blood; D008297:Male; D008460:Meat / Q000592:standards*; D018482:Muscle, Skeletal / Q000737:chemistry / Q000502:physiology; D009711:Nucleotides / Q000008:administration & dosage / Q000032:analysis / Q000494:pharmacology*; D012441:Saccharomyces cerevisiae / Q000737:chemistry*; D013312:Stress, Physiological / Q000209:etiology / Q000517:prevention & control / Q000662:veterinary*; D013552:Swine / Q000378:metabolism / Q000502:physiology* / Q000523:psychology
chemical_list: D001786:Blood Glucose; D009711:Nucleotides; D007770:L-Lactate Dehydrogenase; D001219:Aspartate Aminotransferases; D003402:Creatine Kinase; D006854:Hydrocortisone