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《Journal of First Military Medical University》 2001-12
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gyrA gene mutations in quinolone-resistant Shigellae flexneri

XIANGQian 1 ,YUShou-yi 2 ,WANGHong 2 ( 1 Departmentof MedicalTeachingandResearch,NanfangHospital,2 Departmentof Epidermiology,FirstMilitaryMed-icalUniversity,Guangzhou510515,China)  
Objective To studytheresistancemechanismof quinoloneagainstShigellae flexneri.Methods TheN-terminal codingregionof gyrA geneof38quinolone-resistantShigellae flexneri were amplifiedby PCRandmutationsdetectedby single-strandconformationpolymorphism(SSCP),followedby sequenceanalysis.Results Eightisolateswerefoundto be positivefor gyrA mutations,andDNAsequenceanalysisof gyrA generevealed2mutationsthatresultedin changesof the aminoacids(Ser-83→Leu,Asp-87→Gly).Conclusion gyrA genemutationsiscloselyrelatedto highresistanceof Shigellae flexneri toquinolone.
【CateGory Index】: R378.25
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