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1、·1008·檢驗醫(yī)學2013年11月第28卷第11期LaboratoryMedicine,November2013,Vol28.No11.文章編號:16738640(2013)11100804中圖分類號:R446.5文獻標志碼:ADOI:10.3969/j.issn.16738640.2013.11.010廣泛耐藥鮑曼不動桿菌氨基糖苷類藥物獲得性耐藥基因研究王玉月,史偉峰,周軍(蘇州大學附屬第三醫(yī)院檢驗科,江蘇常州213003)摘要:目的了解重癥監(jiān)護病房(ICU)患者分離的廣泛耐藥(XDR)鮑曼不動桿菌(AB)對氨基糖苷類藥物TM獲得性耐藥
2、基因情況。方法用phoenix100全自動細菌鑒定藥物敏感性分析儀對AB進行細菌鑒定和藥物敏感性試驗,gyrA和parC基因擴增測序確定AB。聚合酶鏈反應(PCR)測定20株XDRAB的10種氨基糖苷類修飾酶基因、6種16SrRNA甲基化酶基因和外排泵adeB基因,并用DNA測序比對。結果20株XDRAB中,氨基糖苷類修飾酶基因aac(3)Ⅰ、aac(6′)Ⅰb、ant(3″)Ⅰ、aph(3′)Ⅰ檢出率分別為90.0%、30.0%、95.0%、95.0%,而aac(3)Ⅱ、aac(6′)Ⅰad、aac(6′)Ⅱ、ant(2″)Ⅰ
3、、ant(4′)Ⅰ及aph(3′)Ⅵa基因均未檢出。armA型16SrRNA甲基化酶基因和外排泵adeB基因檢出率均為100%。結論20株XDRAB均攜帶了armA和adeB基因,同時aac(3)Ⅰ、ant(3″)Ⅰ和aph(3)Ⅰ檢出率較高,提示ICU分離的XDRAB對氨基糖苷類藥物高水平耐藥可能與攜帶的耐藥基因有關。關鍵詞:廣泛耐藥鮑曼不動桿菌;氨基糖苷類修飾酶;獲得性耐藥基因;序列分析Thestudyofacquiredresistantgenesagainstaminoglycosidesinextensivelydrugre
4、sistantAcinetobacterbaumanniiWANGYuyue,SHIWeifeng,ZHOUJun.(DepartmentofClinicalLaboratory,theThirdAffiliatedHospitalofSoochowUniversity,JiangsuChangzhou213003,China)Abstract:ObjectiveToinvestigatethesituationofacquiredresistantgenesagainstaminoglycosidesinextensivelydrugresist
5、ant(XDR)Acintobacterbaumannii(AB)isolatedfromintensivecareunit(ICU)patients.MethodsTMBacterialidentificationandsusceptibilitytestsofABwereperformedbyphoenix100automaticbacterialidentificationandsusceptibilityanalyzer,andtheABidentificationwasconfirmedbygyrAandparCgeneamplifica
6、tionsequencing.Forthe20isolatesofXDRAB,10aminoglycosidemodifyingenzymegenes,616SrRNAmethylasegenesandeffluxpumpadeBgenesweredetectedbypolymerasechainreaction(PCR)andverifiedandcomparedbyDNAsequencing.ResultsOfthe20isolatesofXDRAB,thedetectionratesofaac(3)Ⅰ,aac(6′)Ⅰb,ant(3″)
7、Ⅰandaph(3′)Ⅰgeneswere90.0%,30.0%,95.0%and95.0%,respectively.However,aac(3)Ⅱ,aac(6′)Ⅰad,aac(6′)Ⅱ,ant(2″)Ⅰ,ant(4′)Ⅰandaph(3′)Ⅵageneswerenotfound.Inaddition,thearmA16SrRNAmethylasegeneandeffluxpumpadeBgenesexistedinallofthe20isolates,andthedetectionrateswere100%.Conclusion
8、sAllofthe20isolatesofXDRABcarrynotonlyarmAandadeBgene