RUMINANT NUTRITION

Effects of Staphylococcus aureus-Induced Mastitis on Milk Fatty Acid Composition of Chinese Holstein Cows

  • LI Rui ,
  • ZHANG Chenglong ,
  • GENG Xiaohan ,
  • LI Rui ,
  • PU Junhua ,
  • MAO Yongjiang ,
  • JI Dejun ,
  • YANG Zhangping ,
  • WU Suhong ,
  • XU Xiangqian ,
  • LU Chunbing ,
  • REN Xianglian
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  • 1. Animal Science and Technology College, Yangzhou University, Yangzhou 225009, China;
    2. Animal Disease Prevention and Control Center, Jiangsu Province, Jiangyin 214400, China

Received date: 2015-07-26

  Online published: 2016-02-19

Abstract

The aim of this study was to explore the effects of Staphylococcus aureus (S. aureus)-induced mastitis on milk fatty acid composition and their absolute content of Chinese Holstein cows. The bacterial suspension of S. aureus was administered into the udder to establish a S. aureus-induced mastitis model in experimental group, and PBS was administered in control group. Fatty acid absolute contents in milk were determined by gas chromatography. The results showed as follows:thirty four fatty acids were detected in milk, and fatty acid synthesis at breast area was directly affected by S. aureus-induction. The fatty acids were divided into six categories by degree of saturation and carbon chain length, and compared with 24 h before infection, the absolute contents of short chain fatty acids (sc-FA), medium chain fatty acid (mc-FA) and saturated fatty acid (SFA) at 11 h after infection in experimental group were significantly lower (P<0.05); control group had the same changing tendency, but there were no significant differences (P>0.05) except sc-FA. At 23 h after infection, the absolute content of all six categories of fatty acids in experimental group lower than those in control group. The results indicate that the dynamics of fatty acids had the same trend. These results demonstrated that S. aureus-induced mastitis can affect the synthesis of cow fatty acids and lowered the absolute content of each component.

Cite this article

LI Rui , ZHANG Chenglong , GENG Xiaohan , LI Rui , PU Junhua , MAO Yongjiang , JI Dejun , YANG Zhangping , WU Suhong , XU Xiangqian , LU Chunbing , REN Xianglian . Effects of Staphylococcus aureus-Induced Mastitis on Milk Fatty Acid Composition of Chinese Holstein Cows[J]. Chinese Journal of Animal Nutrition, 2016 , 28(2) : 426 -435 . DOI: 10.3969/j.issn.1006-267x.2016.02.016

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