清脆的
金黄色葡萄球菌
重组酶聚合酶扩增
微生物学
聚合酶链反应
生物
耐甲氧西林金黄色葡萄球菌
重组酶
核酸扩增试验
病毒学
计算生物学
细菌
基因
遗传学
沙眼衣原体
重组
作者
Ying Wang,Xuan Liang,Jie Xu,Lan Nan,Fang Liu,Guotao Duan,Haiyan Yang
标识
DOI:10.3389/fmicb.2022.903298
摘要
Staphylococcus aureus is one of the main pathogens causing hospital and community-acquired infections, in particular, infections caused by methicillin-resistant Staphylococcus aureus (MRSA) cause a higher mortality rate than those caused by methicillin-sensitive strains, which poses a serious global public health problem. Therefore, rapid and ultrasensitive detection of patients with clinical MRSA infection and timely control of infection are essential. Clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated proteins (Cas) based on nucleic acid detection methods are well-known for its high specificity and sensitivity and programmability. Here, we successfully proposed a method based on CRISPR-Cas12a combined with recombinase-aided amplification (RAA) through fluorescent readout to achieve accurate identification and highly sensitive detection of MRSA in clinical samples. Results showed that the limit of detection (LoD) of the RAA-Cas12a method could reach 10 copies/μl at 60 min of reaction. Specificity tests showed that the method could distinguish MRSA from clinically common bacteria. The results of RAA-Cas12a were consistent with that of antimicrobial susceptibility tests (AST) and polymerase chain reaction (PCR) in 83 clinical samples. These results indicated that the detection method based on RAA-Cas12a has high sensitivity and specificity, and provides important value for rapid detection of MRSA.
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