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甲型副伤寒沙门菌的抗生素耐药性及分子分型研究

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Keywords: 沙门菌,抗生素耐药性,脉冲场凝胶电泳,分子分型

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Abstract:

目的了解2008年深圳市福田区腹泻病人中分离的甲型副伤寒沙门菌的耐药性及分子分型特征。方法从辖区内医院腹泻病人中分离得到11株甲型副伤寒沙门菌,选择10种抗生素,用K-B纸片扩散法进行药物敏感试验;细菌基因组DNA经限制性内切酶XbaI酶切,用脉冲场凝胶电泳进行分子分型,使用Quantity-OneTM软件成像并使用BioNumerics6.1软件对其相似性进行分析比较。结果11株甲型副伤寒沙门菌对氨苄西林、诺氟沙星、替卡西林等8种抗生素敏感率均为100%,对其余抗生素则出现中介或耐药菌株。对复方新诺明和氨苄西林敏感率为81.8%,四环素敏感率达90.9%。11株受试菌株的PFGE图谱经软件分析,可分为5个PFGE型,其相似性系数在93%以上。结论本次研究的甲型副伤寒沙门菌对大多数抗生素敏感;菌株间有较高的同源性。

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