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

Area of Science:

• Biomedical Engineering
• Infectious Diseases
• Biosensor Technology

Background:

• Candidemia and invasive candidiasis lead to high mortality and morbidity in hospitalized patients globally.
• Increasing patient complexity and antifungal drug overuse contribute to the rise of these infections.
• Current diagnostic methods like blood culturing are time-consuming, delaying crucial antifungal therapy.

Purpose of the Study:

• To develop a rapid and sensitive biosensor for detecting Candida albicans.
• To overcome the limitations of conventional diagnostic techniques for candidiasis.

Main Methods:

• Development of an electrochemical impedance sensor.
• Functionalization of electrodes with anti-Candida antibodies for yeast cell capture.
• Utilizing electrochemical impedance spectroscopy (EIS) for detection.

Main Results:

• The sensor successfully detected Candida albicans yeast cells.
• Detection was achieved at clinically relevant concentrations.
• The entire detection process was completed in under 1 hour.

Conclusions:

• The developed electrochemical impedance sensor offers a significantly faster alternative to traditional methods for Candida albicans detection.
• This rapid diagnostic tool has the potential to improve treatment initiation and patient outcomes for invasive candidiasis.