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对具有裂解多药耐药菌活性的本地噬菌体的初步调查。

Preliminary survey of local bacteriophages with lytic activity against multi-drug resistant bacteria.

作者信息

Latz Simone, Wahida Adam, Arif Assuda, Häfner Helga, Hoß Mareike, Ritter Klaus, Horz Hans-Peter

机构信息

Division of Virology, Institute of Medical Microbiology, RWTH Aachen University Hospital, Aachen, Germany.

Department of Infection Control and Infectious Diseases, RWTH Aachen University Hospital, Aachen, Germany.

出版信息

J Basic Microbiol. 2016 Oct;56(10):1117-1123. doi: 10.1002/jobm.201600108. Epub 2016 May 19.

Abstract

Bacteriophages (phages) represent a potential alternative for combating multi-drug resistant bacteria. Because of their narrow host range and the ever emergence of novel pathogen variants the continued search for phages is a prerequisite for optimal treatment of bacterial infections. Here we performed an ad hoc survey in the surroundings of a University hospital for the presence of phages with therapeutic potential. To this end, 16 aquatic samples of different origins and locations were tested simultaneously for the presence of phages with lytic activity against five current, but distinct strains each from the ESKAPE-group (i.e., Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter cloacae). Phages could be isolated for 70% of strains, covering all bacterial species except S. aureus. Apart from samples from two lakes, freshwater samples were largely devoid of phages. By contrast, one liter of hospital effluent collected at a single time point already contained phages active against two-thirds of tested strains. In conclusion, phages with lytic activity against nosocomial pathogens are unevenly distributed across environments with the prime source being the immediate hospital vicinity.

摘要

噬菌体是对抗多重耐药细菌的一种潜在替代方法。由于其宿主范围狭窄且新病原体变种不断出现,持续寻找噬菌体是优化细菌感染治疗的先决条件。在此,我们在一家大学医院周边进行了一项临时调查,以寻找具有治疗潜力的噬菌体。为此,我们同时检测了16份来自不同来源和地点的水样,看是否存在对当前5种不同菌株具有裂解活性的噬菌体,这些菌株均来自ESKAPE组(即粪肠球菌、金黄色葡萄球菌、肺炎克雷伯菌、鲍曼不动杆菌、铜绿假单胞菌和阴沟肠杆菌)。70%的菌株能够分离出噬菌体,涵盖了除金黄色葡萄球菌外的所有细菌种类。除了来自两个湖泊的样本外,淡水样本中大多没有噬菌体。相比之下,在单个时间点采集的一升医院污水中就已经含有对三分之二测试菌株有活性的噬菌体。总之,对医院病原体具有裂解活性的噬菌体在不同环境中分布不均,主要来源是医院周边地区。

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