《中国畜牧兽医》---唯一指定的官方网站 ›› 2016, Vol. 43 ›› Issue (7): 1737-1742.doi: 10.16431/j.cnki.1671-7236.2016.07.012

• 动物营养与饲料科学 • 上一篇    下一篇

贵州省猪源沙门氏菌对β-内酰胺类药耐药性及耐药基因分析

曹正花1, 谭艾娟1, 吕世明2, 王雄1, 杜国琴1   

  1. 1. 贵州大学生命科学学院, 贵阳 550025;
    2. 贵州大学动物科学学院, 贵阳 550025
  • 收稿日期:2015-11-25 出版日期:2016-07-20 发布日期:2016-07-22
  • 通讯作者: 吕世明 E-mail:lvlvsm@163.com
  • 作者简介:曹正花(1991-),女,吉林白山人,硕士生,研究方向:细胞功能成分研究与利用,E-mail:1602685122@qq.com
  • 基金资助:

    贵州省科技厅农业攻关计划项目"生鲜乳安全保障关键技术集成与示范"(黔科合NZ字[2012]3011号)

Analysis of Drug Resistance and Resistant Genes of Salmonella to β-lactams Antimicrobial Agents Isolated from Pigs in Guizhou Province

CAO Zheng-hua1, TAN Ai-juan1, LV Shi-ming2, WANG Xiong1, DU Guo-qin1   

  1. 1. College of Life Science, Guizhou University, Guizhou 550025, China;
    2. College of Animal Science, Guizhou University, Guizhou 550025, China
  • Received:2015-11-25 Online:2016-07-20 Published:2016-07-22

摘要:

为了解贵州省猪源沙门氏菌对β-内酰胺类抗菌药物耐药性及其耐药基因的流行情况,本试验从贵州省9个地区规模养猪场中分离鉴定130株沙门氏菌,采用微量肉汤稀释法测定其对常用的8种β-内酰胺类抗菌药物的敏感性,并用PCR法对β-内酰胺酶耐药基因进行检测。结果显示,沙门氏菌对常用的β-内酰胺类抗菌药物耐药性十分严重,其中对头孢他啶的耐药率为100%,其次是氨苄西林和阿莫西林,耐药率分别为80.77%和76.15%,耐药率最低的是头孢噻呋和头孢氨苄,均为46.15%。所有菌株均为多重耐药,其中最少为二重,占总数的2.31%,最多为八重,占总数的4.62%,多重耐药主要集中在四至七重,占总数的88.46%。PCR结果显示,SHV耐药基因未检出,TEMOXACTX-M 3种基因检出率分别是85%、75%和46%,细菌的耐药性与相关耐药基因的检出率基本呈正相关。结果表明,猪源沙门氏菌对β-内酰胺类药物具有普遍耐药性,其中头孢他啶尤为严重。TEMOXACTX-M基因是贵州省猪源沙门氏菌主要耐药基因,临床日益严重的耐药现象与耐药基因的普遍存在有很大的关系。

关键词: 沙门氏菌; β -内酰胺药物; 药敏试验; 耐药基因; 耐药表型

Abstract:

In order to analyse the resistance to β-lactams antimicrobial agents and the prevalence of resistant genes of Salmonella in Guizhou province,130 Salmonella strains were isolated and identified from 9 different regions of scale pig farms.The drug sensitivity to 8 kinds of β-lactams antimicrobial agents were determined by using the broth microdilution method.All β-lactams resistant isolates were detected for the presences of TEM,OXA,CTX-M and SHV genes by PCR.The results showed that drug resistance of Salmonella to the commonly used β-lactams antimicrobial agents was very serious,and the resistance rate to ceftazidime was the highest (100%),followed by ampicillin and amoxicillin,were 76.15% and 80.77%,respectively.The resistance rates of ceftiofur and cephalexin were the lowest (46.15%).Salmonella strains were all of multiple drug resistance,of which double resistance was at lowest (2.31%),and eightfold resistance was highest (4.62%),multidrug resistance mainly concentrated in fourfold to sevenfold,accounted for 88.46%.PCR results showed that TEM,OXA,CTX-M genes detection rate were 85%,75% and 46%,respectively,while the SHV gene was not inspected.Resistant phenotype was basically consistent with resistant genes.The results indicated that the resistance of Salmonella stains from pig to β-lactams antimicrobial agents were widespread,and ceftazidime was particularly serious.The TEM,OXA and CTX-M genes were mainly carried β-lactams resistant genes in Salmonella isolates from Guizhou province.It had a great relationship between the prevalence of resistance genes and growth of antimicrobial resistance.

Key words: Salmonella; β-lactamas drugs; drug sensitivity test; resistance genes; resistant phenotypes

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