China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (5): 1531-1538.doi: 10.16431/j.cnki.1671-7236.2020.05.028

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Effect of Tetramethylpyrazine on Listeria monocytogenes Infection and Innate Immunity of Rex Rabbits

ZHENG Jiangping1, LIU Ning2, BAI Xuerui1, ZHANG Feike3   

  1. 1. Shanghai Vocational and Technical College of Agriculture and Forestry, Shanghai 201600, China;
    2. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China;
    3. Luoyang Xintai Agriculture and Animal Husbandry Technology Co., Ltd., Luoyang 471400, China
  • Online:2020-05-20 Published:2020-05-18

Abstract: The study aimed to investigate the effect of tetramethylpyrazine(TMP) supplementation on Listeria monocytogenes loads,listeriolysin O (LLO),proinflammatory factors (TNF-α,IL-1β and IFN-γ),immune organ index and natural immunoglobulins of Rex rabbits infected with Listeria monocytogenes.A total of 180 Rex rabbits were randomly assigned to 5 groups with 6 replicates of 6 rabbits.The control group was fed with the basal diet,and the other four groups were fed with the addition of TMP at 0,50,100 and 150 mg/kg of diet,respectively.Each Rex rabbit in the four treatments was fed with 1 mL (107 CFU) of Listeria monocytogenes,and the control group was fed with the culture medium of aseptic strainat first day of feeding trial.The trial lasted for 14 days.The results showed that TMP addition decreased the loads of Listeria monocytogenes in the spleen,liver and lymph nodes (P<0.05).The pathogen loads in caecal content,liver,spleen and lymph nodes linearly decreased (P<0.05).Also,TMP decreased serum LLO levels and proinflammatory factors TNF-α and IL-1β (P<0.05).Linearly decreased for LLO and linearly and quadratically decreased for TNF-α and IL-1β (P<0.05) at 14 d.The indexes of spleen and liver and the serum levels of IgA and IgG inhanced with the increasing doses of TMP,but the spleen index on 7 d post administration linearly decreased (P<0.05).In conclusion,supplemental TMP in the rabbit diet could attenuate Listeria monocytogenes infection by reducing the pathogen loads and virulence,increasing immune organ indexes and natural immunoglobulins.

Key words: TMP; Listeria monocytogenes; bacterial load; innate immunoglobulins; Rex rabbit

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