Disposable microfluidic micromixers for effective capture of Cryptosporidium parvum oocysts from water samples

Protecting drinking water supplies from pathogens such as is a major concern for water utilities worldwide. The sensitivity and specificity of current detection methods are largely determined by the effectiveness of the concentration and separation methods used. The purpose of this study is to develop micromixers able to specifically isolate and concentrate , while allowing in situ analysis. In this study, disposable microfluidic micromixers were fabricated to effectively isolate oocysts from water samples, while allowing direct observation and enabling quantification of oocysts captured in the device using high quality immunofluorescence microscopy. In parallel, quantitative analysis of the capture yield was carried out by analyzing the waste from the microfluidics outlet with an Imaging Flow Cytometer. At the optimal flow rate, capture efficiencies up to 96% were achieved in spiked samples. Scaled microfluidic isolation and detection of will provide a faster and more efficient detection method for compared to other available laboratory-scale technologies.