ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (11): 2274-2279.doi: 10.11843/j.issn.0366-6964.2016.11.015

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Construction and Characterization of a Haemophilus parasuis potD Mutant Strain

JIN Jin1, ZHANG Lu-hua1, WEN Xin-tian1,LI Ying1, DAI Ke1, ZHOU Peng 1,2, ZHAO Yu-jia1, CAO San-jie1, HUANG Xiao-bo1, WU Rui1, ZHAO Qin1, WEN Yi-ping 1*   

  1. (1.Research Center of Swine Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China; 2. Panzhihua Bureau of Agriculture and Animal Husbandry, Panzhihua 617000, China)
  • Received:2016-06-27 Online:2016-11-23 Published:2016-11-23

Abstract:

As a transporter, protein encoded by potD is involved in the binding and transportation of polyamine, which is necessary for the growth of cells. In some pathogens, the protein is identified as a virulence-associated factor, but of which the function is still unclear in Haemophilus parasuis. A potD mutant strain SC1401ΔpotD::kan was constructed by the natural transformation method. The growth curve, the ability of autoagglutination and biofilm formation, serum resistance ability and the virulence to mice of the parental strain SC1401 and potD mutant strain were measured. No significant difference was observed between the parental and mutant strains in the growth curve and the ability of autoagglutination and biofilm formation. However the potD mutant strain showed an obvious decrease in serum resistance ability and the virulence to mice. The findings above suggested that potD gene may be associated with virulence in H. parasuis.

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