Viral Shedding Detection
Viral Shedding Detection - Related Videos
05:04
Viral Antigen Microarray Assay to Detect Antibody Isotypes in Serum Against Viral Antigen
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2025
In this video, we demonstrate the process for detecting antibody isotypes in multiple human serum samples using a microarray slide printed with antigenic subtypes of influenza virus strains.
03:20
Nested-PCR to Detect a Specific Viral Genomic Sequence
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2025
This video describes nested polymerase chain reaction, a technique that consists of two sequential PCR amplification processes using two primer sets. The first set of primers is intended to anneal to sequences upstream of the second set, resulting in selective amplification of specific gene sequences. This PCR is more sensitive and specific than a normal PCR and is widely used as a detection technique for various diseases.
02:37
Detection of Zika Viral dsRNA Replication Intermediates Using Immunocytochemistry
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2026
Source: Contreras, D., et al. Zika Virus Infectious Cell Culture System and the In Vitro Prophylactic Effect of Interferons. J. Vis. Exp. (2016)The video demonstrates the detection of Zika viral dsRNA intermediates in infected epithelial cells using immunocytochemistry. Infected cells are fixed and then blocked with a blocking solution. The primary and secondary antibodies are added. The nuclei are stained with a fluorescent dye. The labeled viral dsRNA is then seen under a fluorescence...
10:16
Detection of Viral RNA by Fluorescence in situ Hybridization (FISH)
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Cited by 35 •
2012
A fluorescence in situ hybridization (FISH) method was developed to visually detect viral genomic RNA using fluorescence microscopy. A probe is made with specificity to the viral RNA that can then be identified using a combination of hybridization and immunofluorescence techniques. This technique offers the advantage of identifying the localization of the viral RNA or DNA at steady-state, providing information on the control of intracellular virus trafficking events.
03:56
An In Vitro Recombinant Virus Reporter System for the Detection of Viral Infection
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2025
This video demonstrates an in vitro technique to detect hepatitis B virus (HBV) infection via a recombinant HBV reporter system. Upon infecting host cells, the recombinant viral genome expresses the luciferase reporter enzyme, which produces bioluminescence upon oxidizing its substrate — helping detect viral infection.
FAQs
Interpretation depends on what the assay measures. Nucleic acid amplification can identify viral genetic material, whereas viral culture addresses whether infectious particles are present and replication-competent. Antigen testing provides another detection approach, but these methods do not answer identical questions. Selecting among them therefore affects conclusions about viral presence, infectivity, and possible transmission.
Repeated measurements show how virus release changes during infection rather than providing only a single time point. In immunology and infection studies, this timeline can help characterize immune control and relate detection patterns to contagiousness. The same longitudinal approach also supports evaluation of antiviral treatment, vaccine studies, and investigation of whether infection appears persistent or recurrent.
Respiratory secretions, saliva, blood, stool, and genital fluids can all serve as collection materials, but each represents a different body compartment. The selected specimen should fit the infection question and the release pattern being studied. Using more than one specimen type can broaden characterization of shedding, while interpretation still depends on the detection method applied.
A basic workflow begins with collecting a relevant specimen, followed by testing with nucleic acid amplification, antigen testing, or viral culture. Investigators then interpret the result according to whether it indicates viral genetic material, an antigen signal, or infectious particles. Repeating collection over time adds a temporal dimension, allowing changes in shedding to be tracked across infection.
It is useful when researchers or clinicians need evidence to inform infection-control decisions or to follow how an intervention relates to virus release. The overview identifies antiviral treatment evaluation and vaccine studies as major uses. Measurements can also support assessment of persistent or recurrent infection, making the approach relevant to clinical monitoring and controlled immunology and infection research.
A positive result does not automatically provide the same evidence about transmission in every assay. Detection of viral genetic material may show that such material is present, while culture is directed toward replication-competent virus. Because contagiousness is one purpose of monitoring, investigators must consider the measurement type when connecting a result with potential infectiousness or infection-control decisions.