Mycobacterium avium复合体的临床和基因组特征:一个多国欧洲研究
Nils Wetzstein1,2,3, Margo Diricks4,5, Thomas B Anton6
1Department of Internal Medicine, Infectious Diseases, Goethe University, University Hospital, Theodor-Stern-Kai 7, FrankfurtFrankfurt Am Main, 60590, Germany. wetzstein@med.uni-frankfurt.de.
Genome medicine
|July 9, 2024
概括
这项研究显示,在欧洲和全球范围内,Mycobacterium avium复合体 (MAC) 隔离物广泛聚集,在M. intracellulare亚种中常见的等离子体. 喜梅拉 (MCH). 喜梅拉是一种 需要进一步的研究来了解MAC传输和等离子体的作用.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 流行病学 流行病学
背景情况:
- 在中欧,Mycobacterium avium复合体 (MAC) 是最常见的非结核菌 (NTM),其中包括M. avium (MAV),M. intracellulare亚种. 细胞内 (MINT) 和M.细胞内亚种. 喜梅拉 (MCH) 是最相关的.
- 对MAC种群结构和基因组景观的有限研究阻碍了对病理生物学差异的理解.
研究的目的:
- 调查欧洲MAC分离物种的种群结构和基因组景观.
- 确定基因组数据和临床特征之间的潜在联系.
- 探索MAC物种中的等离子体和耐药性/病毒性基因的流行情况.
主要方法:
- 来自德国,法国和瑞士的610个MAC分离物的全基因组测序 (WGS).
- 遗传学分析,包括对全球背景的1307个公共序列进行比较.
- 从WGS数据中预测等离子体,耐药性和毒性基因.
- 将基因组数据与详细的临床特征联系起来.
主要成果:
- 在欧洲和全球范围内观察到MAC分离物的显著聚类,其中MAV,MCH和MINT是占主导地位的物种.
- 经常检测到等离子体,特别是在MCH (98.7%),而对氨基糖化物和宏化物的耐药性很少见.
- 遗传学分组与临床表现之间没有发现直接联系,尽管MCH和MINT与肺外疾病的相关性较小.
- 与不同的MAC菌株或物种共同感染或共同殖民经常发生 (32.6%的患者有连续隔离).
结论:
- 欧洲的MAC分离体表现出显著的种群聚类,其中等离子体普遍存在,特别是在MCH中.
- 进一步的研究至关重要,以阐明MAC传播途径和等离子体在毒性中的作用.
- 了解MAC基因组学和流行病学对于管理NTM感染至关重要.
相关概念视频
Sputum Studies II: Culture and Sensitivity
2.0K
Description
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
The test can identify various pathogens responsible for respiratory infections, including Streptococcus,...
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
The test can identify various pathogens responsible for respiratory infections, including Streptococcus,...
2.0K
Endocarditis II: Clinical Features of Infective Endocarditis
929
Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
929
Modern Molecular Taxonomy
836
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
836
Atypical Pneumonia
84
Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease...
84
Clinical Significance of Antibiotic Resistance
90
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
90


