一个多重的Taqman PCR测定,用于从全血中检测MRSA
Suhanya Duraiswamy1, Sushama Agarwalla1, Khoi Sheng Lok2
1Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Telangana, India.
PloS one
|November 27, 2023
概括
一种新方法使用磁珠和PCR检测血液中的甲素耐药黄金葡萄球菌 (MRSA). 虽然特定,但该试验测试.
科学领域:
- 微生物学 微生物学
- 分子诊断学 分子诊断
- 传染性疾病 传染性疾病
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 是一个重要的全球病原体,导致严重的医院和社区获得的感染.
- MRSA 感染与不良的临床结果有关,包括器官衰竭,感染性休克和死亡率,这强调了快速诊断的必要性.
- 目前的诊断方法可能耗时,延迟了对MRSA感染的适当治疗.
研究的目的:
- 开发和验证一种快速方法,直接从全血中进行MRSA的阳性丰富和检测.
- 建立一种能够同时识别金黄色葡萄球菌和赋予甲素耐药性的mecA基因的测试方法.
- 评估开发的诊断方法的性能特征,包括特异性和检测极限.
主要方法:
- 用蛋白质涂层的磁珠来选择性丰富细菌,这些细菌来自的全血样本.
- 富化后,细菌被溶解,并提取DNA进行实时多重PCR.
- 该PCR试验的目标是细菌16SrRNA基因,金黄色葡萄球菌特定的spa基因和mecA基因,其中lambda菌体作为内部控制.
主要成果:
- 多重PCR试验在检测向细菌标记物方面表现出100%的特异性.
- 该试验成功地在单微生物和多微生物模型中确定了MRSA,包括金黄色葡萄球菌和凝固酶负型葡萄球菌.
- 综合方案实现了检测的下限,大约是每毫升全血中100-1000个MRSA殖民地形成单位 (CFU).
结论:
- 开发的方法为全血中MRSA检测提供了一种快速,具体的方法,有可能改善临床诊断.
- 试验的预处理步骤需要进一步优化,以提高灵敏度并达到较低的检测极限.
- 未来的研究将专注于完善血液预处理方法,以克服当前的局限性并提高整体检测性能.
更多相关视频
11:09Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres
Published on: October 23, 2011
16.3K
09:03Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus
Published on: September 5, 2013
11.9K
相关概念视频
Real Time RT-PCR
Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...
The real-time quantification of the number of amplified products is...
Rapid Identification of Pathogens
MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...
Automated Microbial Diagnostics
Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...
Clinical Significance of Antibiotic Resistance
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 the One...
