Detection system based on magnetoelastic sensor for classical swine fever virus.

Area of Science:

• Biosensing Technologies
• Veterinary Diagnostics
• Magnetoelastic Sensors

Background:

• Classical swine fever virus (CSFV) poses a significant threat to swine populations globally.
• Accurate and rapid diagnostic tools are crucial for controlling CSFV outbreaks.
• Existing diagnostic methods may have limitations in terms of speed, sensitivity, or cost.

Purpose of the Study:

• To develop and validate a novel magnetoelastic (ME) sensing system for the sensitive detection of CSFV.
• To investigate the performance characteristics of the ME biosensor, including sensitivity and detection limit.
• To confirm the specificity and effectiveness of the developed biosensor system.

Main Methods:

• Immobilization of anti-CSFV IgG onto a magnetoelastic sensor surface via physical absorption.
• Design of a measurement circuit utilizing impedance analysis to measure the biosensor's resonance frequency.
• Characterization of the biosensor response to varying CSFV concentrations.
• Validation using SEM imaging, ELISA, interference studies, and a reference biosensor method.

Main Results:

• The resonance frequency shift of the ME biosensor was directly correlated with CSFV concentration.
• A linear relationship between frequency shift and CSFV concentration was observed up to 2.5μg/ml.
• The ME biosensor achieved a sensitivity of approximately 95Hz/μg·ml⁻¹ and a detection limit of 0.6μg/ml.
• Validation studies confirmed the effectiveness and specificity of the anti-CSFV IgG and CSFV interaction.

Conclusions:

• The developed magnetoelastic sensing system offers a promising approach for the rapid and sensitive detection of CSFV.
• The ME biosensor system provides a quantitative measure of CSFV concentration.
• This technology has the potential to enhance classical swine fever surveillance and control strategies.