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Science:多药耐药性感染在囊性纤维化患者中扩散

2016-11-13 佚名 生物谷

在一项新的研究中,来自英国剑桥大学和韦尔科姆基金会桑格研究所的研究人员发现一种在囊性纤维化(cystic fibrosis, CF)病人体内能够导致生命威胁性疾病的而且能够在病人之间进行传播的多药耐药性病原菌感染正变得越来越致命。相关研究结果发表在2016年11月11日那期Science期刊上,论文标题为“Emergence and spread of a human transmissible


在一项新的研究中,来自英国剑桥大学和韦尔科姆基金会桑格研究所的研究人员发现一种在囊性纤维化(cystic fibrosis, CF)病人体内能够导致生命威胁性疾病的而且能够在病人之间进行传播的多药耐药性病原菌感染正变得越来越致命。相关研究结果发表在2016年11月11日那期Science期刊上,论文标题为“Emergence and spread of a human transmissible multidrug-resistant nontuberculous mycobacterium”。

这项研究也提示着常规清除将不足以消除这种能够通过污染的表面或在空气中进行传播的病原菌。

作为一种多药耐药性的分枝杆菌物种,脓肿分枝杆菌(Mycobacterium abscessus)最近日渐成为CF病人和其他肺病病人的一种重要的全球威胁。它能够导致一种严重的肺炎,而这种肺炎导致肺部发生加快的炎性损伤,而且可能阻止安全的肺部移植。它也是非常难以治疗的。

研究人员之前提供遗传学和流行病学证据,提示着脓肿分枝杆菌发生人际间的传播,但是并不清楚的是,这是否是一种个例。

如今,通过对来自欧洲、美国和澳大利亚的517名CF病人的1000多种分枝杆菌分离株进行全基因组测序,研究人员证实绝大多数CF病人感染上已在全球扩散的脓肿分枝杆菌的可传播性菌株。进一步分析提示着在医院内,这种感染可能是通过污染的表面和通过空气进行传播的。这对医院的感染控制措施造成潜在严重性的挑战。

利用基于细胞的模型和小鼠模型,研究人员证实这种最近出现的分枝杆菌具有更强的毒性,可能导致病人患上更加严重的疾病。

如今,研究人员将想要解答的一个问题是这种病原菌如何成功在全球扩散。这项新的研究证实它不仅能够在疾病专科中心内的病人之间进行扩散,而且它也能够在大陆间进行扩散。这种机制是不清楚的,但是研究人员猜测健康人可能无意识地携带来自不同国家的脓肿分枝杆菌。

这些测序数据也揭示出潜在的新药物靶标,而且研究人员如今专注于与来自剑桥大学和科罗拉多州立大学的其他团队之间的合作以便进一步开发这些靶标。

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    2017-05-08 wolongzxh
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    2016-11-15 jichang
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