来自免疫受损患者的异质万科米中等耐药黄金葡萄球菌菌株的耐药性表型和遗传特征
Xin Cheng1, Yaru Wang2, Jingxin Ma1
1Clinical Laboratory Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
概括
发现了一种新型的异质菌素中间体黄金葡萄球菌 (hVISA) 菌株. 范科米辛治疗减少了hVISA异质性,比较基因组学揭示了与hVISA表型相关的19个基因中的205个突变部位.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 传染性疾病 传染性疾病
背景情况:
- 免疫抑制患者的持续性细菌血症是一个重大的临床挑战.
- 黄金葡萄球菌 (Staphylococcus aureus) 出现的抗胺素耐药性,包括异质抗胺素中间耐药性 (hVISA),是越来越令人担忧的.
- 了解hVISA的遗传基础对于开发有效的治疗策略至关重要.
研究的目的:
- 从患有持续性细菌血症的患者中分离和鉴定一种新的hVISA菌株.
- 为了研究万科米辛治疗对hVISA异质性的影响.
- 通过比较基因组学识别与hVISA表型相关的潜在遗传突变.
主要方法:
- 隔离和特征的黄金葡萄球菌菌株C1.1.
- 种群分析概况曲线下的面积 (PAP-AUC),以评估万科米辛耐药性的异质性.
- 基因型鉴定 (SCCmec,ST,t,agr) 和全基因组测序.
- 在hVISA菌株C1和参考菌株N315.5之间进行比较基因组学分析.
主要成果:
- 从免疫抑制患者中分离出来的C1菌株被确定为hVISA.
- 范科米辛治疗导致衍生菌株 (C6,C8,C9) 的异质性显著减少.
- 对比基因组学在19个候选基因中确定了205个突变部位,这些基因可能与hVISA表型有关.
结论:
- 一种新的hVISA菌株被确定,突出了黄金葡萄球菌的适应性.
- 范科米辛治疗可以调节hVISA菌株的异质性.
- 比较基因组学为hVISA表型的遗传基础提供了洞察力,确定了未来研究的潜在目标.
更多相关视频
08:51Atomic Force Microscopy Combined with Infrared Spectroscopy as a Tool to Probe Single Bacterium Chemistry
Published on: September 15, 2020
3.9K
08:58Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
Published on: March 3, 2023
6.5K
相关概念视频
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K
Antibiotic Selection
54.2K
Overview
54.2K
