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 15 •
2017
This protocol describes the recovery of infectious Zika virus from a two-plasmid infectious cDNA clone.
00:23
Kinetic Energy
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2019
Kinetic energy is the ability of an object in motion to do work or enact change. It can take on many forms. For instance, water flowing down a waterfall has kinetic energy. In biological systems, particles of light travel and are absorbed by plants to create chemical energy. Animals consume the chemical energy and give off molecules that carry their scent through the air. They also generate kinetic energy when they run away from predators. Entire systems also possess kinetic energy, like the...
09:02
Monitoring Influenza Virus Survival Outside the Host Using Real-Time Cell Analysis
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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.
01:19
Enzyme Kinetics
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2019
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction. Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
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.