Virus Survival Kinetics
Virus Survival Kinetics - Related Videos
02:52
Cellular Impedance-Based Survival Kinetics Assay to Assess Virus Survival
0 Views •
2025
This video describes a cellular impedance-based technique to study the survival kinetics of viruses that induce cytopathic effects. The method measures the electrical impedance of virus-infected adherent cells pre-treated with saline.
07:35
Rescue and Characterization of Recombinant Virus from a New World Zika Virus Infectious Clone
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Cited by 13 •
2017
This protocol describes the recovery of infectious Zika virus from a two-plasmid infectious cDNA clone.
09:02
Monitoring Influenza Virus Survival Outside the Host Using Real-Time Cell Analysis
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Cited by 1 •
2021
Reported here is a protocol for the quantification of infectious viral particles using real-time monitoring of electrical impedance of infected cells. A practical application of this method is presented by quantifying influenza A virus decay under different physicochemical parameters mimicking environmental conditions.
03:07
Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy
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2020
The kinetic molecular theory qualitatively explains the behaviors described by the various gas laws. The postulates of this theory may be applied in a more quantitative fashion to derive these individual laws. Collectively, the molecules in a sample of gas have average kinetic energy and average speed; but individually, they move at different speeds. Molecules frequently undergo elastic collisions in which the momentum is conserved. Since the colliding molecules are deflected off at different...
08:07
Enzyme Assays and Kinetics
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2023
Enzyme kinetics describes the catalytic effects of enzymes, which are biomolecules that facilitate chemical reactions necessary for living organisms. Enzymes act on molecules, referred to as substrates, to form products. Enzyme kinetic parameters are determined via assays that directly or indirectly measure changes in substrate or product concentration over time. This video will cover the basic principles of enzyme kinetics (including rate equations) and kinetic models. The concepts governing...
FAQs
Viral decay is quantified by collecting samples at multiple time points and measuring how much viable virus remains with an infectivity assay. The resulting time-course data show the decline in infectiousness under a defined condition. Researchers can then estimate a decay rate and compare how quickly infectivity is lost across environments or treatments.
Temperature, humidity, surface material, radiation, and disinfectants can each alter how long infectious virus remains detectable. Their effects should be evaluated under clearly defined conditions because a result obtained on one surface or at one temperature may not represent behavior elsewhere. Controlled comparisons help identify conditions associated with faster inactivation or greater persistence.
Infectivity assays determine whether recovered virus can still produce an infectious outcome, making them central to survival measurements. Tracking viable virus distinguishes retained infectiousness from material that may still be present but no longer functional. This distinction improves interpretation of environmental persistence, storage stability, and the effectiveness of decontamination procedures.
Survival models organize time-course measurements into a framework for comparing the loss of infectivity among viral strains, environmental settings, or treatment conditions. Comparisons are meaningful when sampling and infectivity measurements are defined consistently. The resulting patterns can reveal differences in persistence and support decisions about handling, environmental monitoring, and infection control.
A typical workflow defines the environmental or experimental condition, exposes the virus to that condition, and collects samples at selected time points. Each sample is examined with an infectivity assay to determine remaining viable virus. Researchers then analyze the time-course results with a survival model, allowing the condition or treatment to be evaluated quantitatively.
These studies support several practical decisions, including selection of storage and handling conditions, evaluation of disinfectants, and development of biosafety practices. They also contribute to environmental monitoring, vaccine and biopharmaceutical stability studies, and infection-control planning. By linking conditions with persistence or inactivation, the results help guide procedures that limit infectious virus exposure.