Direct Detection of Candida albicans with a Membrane Based Electrochemical Impedance Spectroscopy Sensor

使用基于膜的电化学阻抗谱传感器直接检测白色念珠菌

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作者:Dorota Kwasny, Sheida Esmail Tehrani, Catarina Almeida, Ida Schjødt, Maria Dimaki, Winnie E Svendsen

Abstract

Candidemia and invasive candidiasis is a cause of high mortality and morbidity rates among hospitalized patients worldwide. The occurrence of the infections increases due to the complexity of the patients and overuse of the antifungal therapy. The current Candida detection method includes blood culturing which is a lengthy procedure and thus delays the administration of the antifungal therapy. Even though the results are available after 48 h it is still the gold standard in pathogen detection in a hospital setting. In this work we present an electrochemical impedance sensor that is capable of detecting Candida albicans yeast. The yeast cells are captured on electrodes specifically functionalized with anti-Candida antibodies and detection is achieved by electrochemical impedance spectroscopy. The sensor allows for detection of the yeast cells at clinically relevant concentrations in less than 1 h.

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