Conductive Thread-Based Immunosensor for Pandemic Influenza A (H1N1) Virus Detection

Area of Science:

• Biomedical Engineering
• Infectious Disease Detection
• Biosensor Technology

Background:

• Viruses, including airborne pathogens, pose significant public health risks requiring rapid detection methods.
• Current detection methods can be time-consuming and may not be suitable for real-time monitoring.
• The need for portable and easily deployable diagnostic tools is critical for controlling infectious disease outbreaks.

Purpose of the Study:

• To develop a novel conductive thread-based immunosensor (CT-IS) for the detection of airborne viruses.
• To specifically target the pandemic influenza A (pH1N1) virus using an antibody against its HA protein.
• To evaluate the feasibility of CT-IS as a wearable biosensor for real-time virus detection.

Main Methods:

• Development of a conductive thread-based immunosensor (CT-IS) incorporating antibodies for the pH1N1 virus HA protein.
• Utilizing the principle of antigen-antibody interaction to induce strain and alter the electrical resistance of the conductive thread.
• Testing the sensor's performance with purified HA protein, pH1N1 virus, and clinical samples from infected and non-infected patients.

Main Results:

• The CT-IS demonstrated a significant change in electrical resistance upon interaction with the pH1N1 virus and its HA protein.
• The sensor showed a clear distinction in resistance changes between samples from pH1N1-infected patients (n=11) and healthy controls (n=9).
• Negligible resistance changes were observed in control samples, indicating high specificity.

Conclusions:

• The developed CT-IS is a sensitive and specific biosensor for detecting the pandemic influenza A (pH1N1) virus.
• Its lightweight, fiber-type design allows for integration into textiles, enabling wearable applications.
• CT-IS offers a promising platform for rapid, point-of-care detection of airborne viral threats.