文献名： Microfluidic thread-based electrochemical aptasensor for rapid detection of Vibrio parahaemolyticus

作者 ： Hai Jiang ， Zhikang Sun ， Qian Guo ， Xuan Weng

School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China

摘要： Vibrio parahaemolyticus  is one of the foodborne bacteria that widely present in seafood as well as the leading cause of seafood-associated bacterial gastroenteritis. Traditional identification of such pathogens mainly relies on culturing methods, ELISA  or PCR . These methods are usually laborious, time-consuming with poor diagnosis competences, or require costly and bulky equipment though of high sensitivity. In this study, a thread-based microfluidic  electrochemical aptasensor  was designed, fabricated and tested by using label-free aptamer immunosensing technology for rapid and highly sensitive detection of Vibrio parahaemolyticus  in seafood. Both the microfluidic channels  and electrodes were simply fabricated on threads. Molybdenum disulfide  (MoS ₂ ) nanosheets  were used to obtain enhanced sensitivity of the electrochemical measurement. When used in detecting Vibrio parahaemolyticus , the proposed aptasensor has a dynamic detection range of 10–10 ⁶ CFU  mL ⁻¹  with a detection limit of 5.74 CFU mL ⁻¹ . Compared with traditional plate counting method, the proposed aptasensor has higher detection sensitivity and less assay time (30 min), while high specificity and accuracy are kept. The proposed microfluidic thread-based electrochemical aptasensor grabs the potential to detect other pathogens by simply functionalizing the threaded electrodes with aptamers for targeted biological substances.

关键词： Thread-based electrodes； Microfluidic ； Electrochemical aptasensor ； MoS ₂ ； Vibrio parahaemolyticus