ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (8): 1529-1534.doi: 10.11843/j.issn.0366-6964.2017.08.018

Previous Articles     Next Articles

The Analysis of the Difference of Salmonella Resistance between High and Low Heterophil/Lymphocyte Ratio in Chickens

YING Fan1,2, LI Peng2, XING Si-yuan2, LI Qing-he2, ZHENG Mai-qing2, LIU Ran-ran2, CUI Huan-xian2, WEN Jie2, MA You-ji1*, ZHAO Gui-ping2*   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-02-20 Online:2017-08-23 Published:2017-08-23

Abstract:

This study was conducted to reveal the difference of immune response upon Salmonella enteritidis (SE) infection between chickens with different Heterophil and Lymphocyte ratio, and trying to prove that chicken flocks of low H/L values has better resistance to Salmonella. Chicken with high and low H/L ratio were selected as parents, and the offspring were divided as High H/L Group and Low H/L Group (HG and LG). The ratio of male and female is 1:3. The chicks were challenged with SE at 7 days old. Liver, cecum and blood serum were collected at 1, 2, 4, 7 and 13 dpi (days post infection). Our results showed that the mortality rate of LG (16.7%) was significantly lower than HG (22.9%). The CFU of SE in liver were significantly different between HG and LG (P<0.05) at 1, 2, 4 and 7 dpi. IL-6 in serum were remarkably higher in Low H/L group than in high group (P<0.05) at 1, 2 and 4 dpi. Low H/L chickens had more TNF-α and LTB-4 in serum than high H/L chickens (P<0.05) at 1, 2 dpi. Chicken with low H/L ratio might have stronger immune response against bacterial infection.

CLC Number: