食品科学 ›› 2018, Vol. 39 ›› Issue (17): 182-186.doi: 10.7506/spkx1002-6630-201817030

• 营养卫生 • 上一篇    下一篇

食源性沙门氏菌分离株致病性研究和毒力相关基因检测

刘书宏,吴科敏,周辰瑜,梁竞臻,韦 平*   

  1. 广西大学养禽与禽病研究所,广西 南宁 530004
  • 出版日期:2018-09-15 发布日期:2018-09-18
  • 基金资助:
    广西科学研究与技术开发计划项目(桂科重14121003-4-1);现代农业产业技术体系建设专项(nycytxgxcxtd-04-20-2)

Foodborn Salmonella Isolates: Pathogenicity Evaluation and Detection of Virulence Genes

LIU Shuhong, WU Kemin, ZHOU Chenyu, LIANG Jingzhen, WEI Ping*   

  1. Institute for Poultry Science and Health, Guangxi University, Nanning 530004, China
  • Online:2018-09-15 Published:2018-09-18

摘要: 为研究零售鲜肉源沙门氏菌(Salmonella)优势血清型分离株的致病性及相关毒力基因的相关性,本研 究分别取4 种优势血清型S. derby、S. agona、S. enteritidis、S. typhimurium沙门氏菌分离株对SPF级昆明小鼠进行致 病性实验,采用改良寇氏法计算半数致死量,判断4 种血清型沙门氏菌的毒力,并通过聚合酶链式反应检测实验 菌株中9 种毒力相关基因的分布情况并分析其相关性。结果表明,4 种不同血清型的沙门氏菌分离株对小鼠均有 40%~70%的致死率,S. enteritidis、S. agona、S. derby对昆明小鼠的致病力相似,S. typhimurium较弱,且发现致病 力的强弱与毒力岛SPI-2中的sseL基因密切相关。

关键词: 食源性, 沙门氏菌, 血清型, 致病性, 毒力岛基因

Abstract: The purpose of this study was to evaluate the pathogenicity of the predominant serotypes of Salmonella isolated from retail fresh meat and the relationship between the pathogenicity and virulence genes. The pathogenicity of the dominant serotypes including S. agona, S. derby, S. enteritidis and S. typhimurium against specific pathogen free (SPF) Kunming mice was evaluated by improved Karber’s method, and the distribution of 9 virulence genes was detected by polymerase chain reaction (PCR). The results demonstrated that four predominant Salmonella serovars showed high mortalities of up to 40%?70%. S. enteritidis, S. agona and S. derby had similar pathogenicity, while weaker pathogenicity was observed for S. typhimurium. The pathogenicity of Salmonella was associated with the sseL gene on Salmonella pathogenicity island (SPI-2).

Key words: foodborn, Salmonella, serotype, pathogenicity, virulence genes

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