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NAT MED:ICU患者中,细菌从益生菌胶囊到血液传播的基因组学和流行病学证据

2019-11-09 海北 MedSci原创

最近,研究人员发现,用益生菌治疗的重症监护病房(ICU)患者与未经治疗的重症监护病房(ICU)患者相比,乳酸菌菌血症的风险明显更高。

住院患者服用益生菌可能对许多潜在的适应症有帮助,但其不良反应可能超过其潜在的益处。尤为令人震惊的是,益生菌菌株可引起菌血症,但目前为止,我们尚缺乏直接证据证明血液分离物与施用益生菌之间存在直接联系。

最近,研究人员发现,用益生菌治疗的重症监护病房(ICU)患者与未经治疗的重症监护病房(ICU)患者相比,乳酸菌菌血症的风险明显更高。此外,研究人员还提供了基因组学数据,来支持将益生菌可以直接克隆传播至血液的想法。

基于全基因组的系统发育研究表明,从治疗患者血液中分离出的乳酸杆菌与从相关益生菌产品中分离出的乳酸杆菌在系统上是不可分离的。

实际上,血液分离物中的微小遗传多样性大多反映了在益生菌产品中发现的先前存在的遗传异质性。一些血液分离株还包含了全新的突变,包括在一个患者中发现的非同义SNP,赋予了细菌抗生素耐药性。

因此,该发现表明益生菌菌株可以直接引起菌血症,并在ICU患者体内适应性进化。


原始出处:

Idan Yelin et al. Genomic and epidemiological evidence of bacterial transmission from probiotic capsule to blood in ICU patientsNature Medicine, 2019.


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    2020-04-25 liye789132251
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    2019-11-11 xugumin
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