化学
生物芯片
适体
微流控
大肠杆菌
肺炎克雷伯菌
微生物学
致病菌
纳米技术
细菌
分子生物学
生物
生物化学
材料科学
基因
遗传学
作者
Chen Jing,Hui Li,Hexin Xie,Danke Xu
标识
DOI:10.1016/j.aca.2020.07.061
摘要
The β-lactam drugs resistance poses a serious threat to human health throughout the world. Klebsiella pneumoniae carbapenemase 2 (KPC-2) is a carbapenemase that produced in bacteria can hydrolyze carbapenems, which typically considered as the antibiotics of last resort. Therefore, there is an urgent need to quickly and accurately detect whether bacteria express KPC-2. In this paper, a PDMS/glass microfluidic biochip integrated with aptamer-modified Ag10NPs nano-biosensors was developed for rapid, simple and specific pathogenic bacteria detection, more importantly, the biochip was combined with bright field imaging, then the captured bacteria could be observed and counted directly without using extra chemical labeling. KPC-2-expressing Escherichia coli (KPC-2 E.coli) was used as the target bacterium with a detected limit of 102 CFU and capture efficiency exceeded 90%. This method is remarkably specific towards KPC-2 E.coli over other non-resistant bacteria, and pathogen assay only takes ∼1 h to complete in a ready-to-use microfluidic biochip. Furthermore, the effective capture and fast counting of microfluidic biochip system demonstrates its potential for the rapid detection of antibiotic-resistant bacteria.
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