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  5. 台灣ESBL臨床菌株之抗藥性分子流行病學之探討
 
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台灣ESBL臨床菌株之抗藥性分子流行病學之探討

Other Title
A study of Molecular Epidemiology of ESBL Clinical Isolates in Taiwan
Type
thesis
Date Issued
2010-06-29
Author(s)
劉育歆
Advisor
吳瑞裕
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:吳瑞裕
共同指導教授:
口試委員:黃聲東;葉光勝
中文關鍵字:ESBL;抗藥性;流行病學;整合子;DNA分子指紋圖譜
Abstract
超廣效乙內醯胺酶(extended-spectrum β-lactamase,ESBL)是第三代頭孢菌素開始進行臨床使用後,細菌所產生可以水解β-lactamase類抗生素的酵素。過去ESBL大都是分佈在Klebsiella pneumoniae以及Escherichia coli,但是目前其它革蘭氏陰性菌(Gram-negative)也陸續出現具有ESBL抗藥性的菌株,如Salmonella enteric、Proteus spp. 在臨床檢驗上也已都相當常見。
近年來,在台灣地區也陸續檢出具有ESBL抗藥性的菌株,為了進一步了解國內本土ESBL的基因型(genotype)分佈流行的情況,以及各種常見的抗藥性基因的存在,在本研究中,我們收集全國北、中、南、東各大醫院的臨床ESBL檢體,想進一步去了解ESBL在台灣臨床上的發展的趨勢。
首先我們利用ERIC分子指紋圖譜分型技術,進行基因多樣性之分析鑑定,比對出各地菌株的種源相關性。此外,我們也進行整合子(integron)中基因卡匣(gene cassette)的分析,因integron主要是細菌獲得新抗藥性基因的主要來源之一及抗藥性基因散佈機制的有關。所以,我們藉由探討integron來去了解全台抗藥性散佈的相關性。最後,本研究也針對幾種常見ESBL抗藥性基因的分子流行病學進行探討,包括:TEM、SHV、CTX-M這三種常見的ESBL抗藥性基因進行細菌的抗藥性研究。利用PCR偵測出含有不同種類的β-lactamase基因的檢體,並找出台灣ESBL抗藥性基因型態的分佈甚至發現新的抗藥性基因。
以上許多資料可以再進一步統計分析,統整ERIC、Integron、TEM、SHV、CTX-M這些資料,與菌株的MIC做串聯,希望能建立全國、區域及院內細菌感染流行病學模式,以幫助日後做細菌抗藥性之追蹤與預測。
URI
https://203.71.86.71/handle/123456789/13271

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