Monitoring Influenza Virus Survival Outside the Host Using Real-Time Cell Analysis

Area of Science:

• Virology
• Biotechnology
• Cell Biology

Background:

• Accurate virus particle quantification is essential in virology.
• Existing methods are often time-consuming or lack sensitivity for detecting minor variations.

Purpose of the Study:

• To present a novel protocol for precise, real-time quantification of viral titer using electrical impedance.
• To demonstrate the protocol's application in assessing virus inactivation kinetics.

Main Methods:

• Utilizing gold microelectrode biosensors in microplates to measure cellular electrical impedance in real-time.
• Analyzing impedance variations correlated with cell number, size, and shape.
• Applying the protocol to quantify the decay of influenza A virus (IAV) under varying environmental conditions (temperature, salinity, pH).

Main Results:

• The protocol enables sensitive, real-time analysis of cell proliferation, viability, morphology, and migration.
• Demonstrated precise quantification of infectious virus particles and reduced workload compared to traditional methods.
• Enabled comparison of inactivation slopes, reflecting virus persistence under different conditions.

Conclusions:

• This electrical impedance-based protocol offers a sensitive, reproducible, and efficient method for virus quantification.
• It is applicable to any virus causing cytopathic effects in cell culture.
• The method facilitates detailed studies on virus infectivity and environmental persistence.