ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (2): 339-343.doi: 10.11843/j.issn.0366-6964.2015.02.023

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The Study on Pathogenicity of a Yak Salmonella onarimon Isolates in Mice

LEI Zhan-dong,ZHANG Bin,YUE Hua,HUANG Zhi-hong,TANG Cheng*   

  1. (College of Life Science and Technology,Southwest University for Nationalities,Chengdu 610041,China)
  • Received:2014-06-03 Online:2015-02-23 Published:2015-02-23

Abstract:

Salmonella onarimon is a rare serotypes in Salmonella,and its pathogenicity has not been reported.The aim of this experiment was to study the pathogenicity of S.onarimon strain swun3736 isolated from yak in BALB/c mice.Using oral method,we studied its pathogenicity by the median lethal dose (LD50),the dynamic distribution and histopathological changes in tissues of mice.The results showed that the LD50 was 5 × 102 CFU.When infected with 105 CFU per mice,bacteria were first isolated from lungs at 24 h PI,and spleen,liver,kidneys and pancreas at 72 h post infection (PI),while brain and heart at 96 h PI.In histopathological examination,it appeared the degeneration,necrosis,inflammatory cell infiltration and other serious damage in the lung,spleen,liver,heart,kidney and ileum.While excepting for ileum,other intestinal bowels exhibited no obvious lesions,suggesting that the ileum was the invasion portal of swun3736.These results demonstrated that S.onarimon swun3736 has strongly virulence,which indicated that public hygienics significance was worth concerned.

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