Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Blood haematology, muscle pH and serum cortisol changes in pigs with different levels of drip loss

  • Koomkrong, Nunyarat (Department of Animal Science, Faculty of Agriculture, Kasetsart University) ;
  • Boonkaewwan, Chaiwat (Department of Animal Science, Faculty of Agriculture, Kasetsart University) ;
  • Laenoi, Watchara (Department of Animal Science, School of Agriculture and Natural Resources, University of Phayao) ;
  • Kayan, Autchara (Department of Animal Science, Faculty of Agriculture, Kasetsart University)
  • Received : 2017.01.21
  • Accepted : 2017.05.24
  • Published : 2017.12.01
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Abstract

Objective: An experiment was conducted to study the blood haematology, muscle pH, and serum cortisol changes in pigs with different levels of drip loss. Methods: Two groups (low and high) of 20 animals were selected from 100 pigs based on drip loss. All [$Duroc{\times}(Large\;White{\times}Landrace)$] pigs were slaughtered according to standard slaughtering procedures. At exsanguinations, blood samples were taken for the haematological parameters and serum cortisol analysis. The muscle samples were taken from longissimus dorsi muscle to evaluate the muscle pH and drip loss. Results: Haematological parameters of low drip loss group showed higher content of white blood cells and monocytes than high drip loss group (p<0.05). The low drip loss group had higher muscle pH at 45 min (p<0.05) and 24 h (p<0.001) post-mortem than the high drip loss group. However, there was no significant difference in serum cortisol levels (p>0.05). Conclusion: Drip loss is mainly affected by the muscle pH decline after slaughter and also might be affected by white blood cells and monocytes.

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