GO:0009597 detection of virus: Host Sensing and Diagnostic Applications, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0009597 detection of virus is defined as the series of events in which a stimulus from a virus is received and converted into a molecular signal, with the synonym perception of virus.
• Detection of virus is a biological_process that underpins both natural host antiviral immunity and laboratory diagnostic assays for viral pathogens.
• The process spans virus particle recognition, nucleic acid sensing, and signal transduction, and is studied across clinical, veterinary, and environmental virology.
• Real-world applications include RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus, RT-LAMP detection of cucurbit chlorotic yellows virus, and environmental surveillance of Japanese encephalitis virus.
• Detection of virus is relevant to asymptomatic and symptomatic respiratory virus detection in immunocompromised pediatric transplant patients and to arbovirus surveillance in mosquitoes.
• CRISPR-based knockout, knock-in, overexpression, and library screening models enable causal dissection of host genes that mediate viral detection.
Description
GO:0009597 detection of virus is a Gene Ontology biological_process term defined as the series of events in which a stimulus from a virus is received and converted into a molecular signal, with the synonym perception of virus. This term captures the earliest host-virus interface, encompassing the recognition of viral particles, viral nucleic acids, or viral proteins and the subsequent generation of intracellular signals that initiate antiviral responses. Because detection of virus is a prerequisite for both immune activation and diagnostic readout, it is a central concept in virology, immunology, and clinical microbiology. The process is not restricted to human hosts; it is also operational in plants, insects, and environmental matrices, as shown by detection of potato virus S in Colorado potato beetle RNA-seq data, detection of arboviruses in mosquitoes, and surveillance of Japanese encephalitis virus in piggery effluent. In clinical settings, detection of virus directly informs patient management, as illustrated by studies of respiratory virus detection in pediatric hematopoietic cell transplant patients and by the absence of tick-borne encephalitis virus RNA in blood, urine, or saliva of hospitalized immunocompetent patients. Methodologically, detection of virus has driven the development of rapid molecular assays, including RT-RPA coupled with CRISPR-Cas12a for respiratory syncytial virus, RT-LAMP for cucurbit chlorotic yellows virus, and PCR-based differentiation of influenza C from influenza D virus in Scottish respiratory samples. For researchers, GO:0009597 provides a structured framework to annotate genes and pathways involved in viral perception, to compare detection mechanisms across virus families, and to design CRISPR-based experiments that test causality between candidate host factors and viral sensing.
detection of virus At A Glance
| GO ID | GO:0009597 |
|---|---|
| GO term | detection of virus |
| Ontology | biological_process |
| Synonym | perception of virus |
| Definition | The series of events in which a stimulus from a virus is received and converted into a molecular signal. |
| Major function | Recognition of viral stimuli and conversion into molecular signals that initiate antiviral or diagnostic responses. |
| Scope | Applies to host immune sensing and to laboratory or environmental detection of viral pathogens. |
| Example viruses | Respiratory syncytial virus, Japanese encephalitis virus, chikungunya virus, influenza C virus, potato virus S, cucurbit chlorotic yellows virus, tick-borne encephalitis virus. |
| Representative methods | RT-RPA/CRISPR-Cas12a, RT-LAMP, RT-PCR, RNA-seq, environmental surveillance. |
What Is GO:0009597?
In this article, GO:0009597 detection of virus is understood as the set of molecular events by which a host or assay system receives a viral stimulus and converts it into a measurable molecular signal. The QuickGO definition emphasizes two linked phases: reception of the viral stimulus and conversion into a signal. This distinguishes detection of virus from downstream antiviral effector processes and from viral replication itself. The synonym perception of virus highlights the sensory nature of the term. Operationally, detection of virus can be studied at the level of nucleic acid recognition, protein recognition, or whole-organism diagnostic detection, as exemplified by RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus, RT-LAMP detection of cucurbit chlorotic yellows virus, and environmental detection of Japanese encephalitis virus.
Why Is detection of virus Important in Cell Biology?
Detection of virus is important because it is the first committed step that determines whether a host mounts an antiviral response and whether a clinical or environmental sample is identified as positive. Without efficient detection of virus, infections may go unrecognized, as seen in asymptomatic and symptomatic respiratory virus detection among pediatric hematopoietic cell transplant patients, and surveillance programs may miss circulating pathogens such as Japanese encephalitis virus in piggery effluent or chikungunya virus in mosquitoes. Conversely, negative detection results, such as the absence of tick-borne encephalitis virus RNA in blood, urine, or saliva of hospitalized immunocompetent patients, shape diagnostic algorithms and patient counseling. Methodological advances in detection of virus, including RT-RPA/CRISPR-Cas12a for respiratory syncytial virus, RT-LAMP for cucurbit chlorotic yellows virus, and PCR-based detection of influenza C virus in Scottish respiratory samples, directly improve outbreak response and point-of-care testing. For basic researchers, GO:0009597 provides a controlled vocabulary to annotate host and viral genes involved in perception, enabling comparative studies across virus-host systems such as potato virus S in Colorado potato beetle RNA-seq data.
• Detection of virus initiates host antiviral signaling and is therefore central to innate immunity.
• It underpins clinical diagnostics, including RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus.
• It supports plant virology, as shown by detection of potato virus S in Colorado potato beetle RNA-seq data.
• It enables environmental and vector surveillance, including Japanese encephalitis virus in piggery effluent and arboviruses in mosquitoes.
• It informs management of immunocompromised patients through respiratory virus detection in pediatric hematopoietic cell transplant recipients.
• It clarifies negative findings, such as the absence of tick-borne encephalitis virus RNA in blood, urine, or saliva of hospitalized immunocompetent patients.
• It drives assay innovation, including RT-LAMP for cucurbit chlorotic yellows virus and PCR-based detection of influenza C virus.
• It provides a framework for CRISPR screens that identify host genes required for viral perception.
• It links molecular sensing mechanisms to epidemiological outcomes and public health decisions.
• It is a prerequisite for distinguishing viral from non-viral stimuli in both research and clinical settings.
What Happens During detection of virus?
Reception of the viral stimulus
In simple terms: The host or assay first encounters the virus or its components.
The initial stage of detection of virus involves encounter and reception of a viral stimulus, which may be an intact virion, a viral nucleic acid, or a viral protein. In clinical and environmental settings, this reception is operationalized by sampling and assay binding, as in RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus and RT-LAMP detection of cucurbit chlorotic yellows virus. In vector and environmental surveillance, reception occurs when mosquitoes or effluent samples contain viral material, enabling detection of arboviruses in mosquitoes and Japanese encephalitis virus in piggery effluent. Reception is also documented in plant-insect systems, where potato virus S sequences are detected in Colorado potato beetle RNA-seq data.
Recognition and signal conversion
In simple terms: The received viral cue is turned into a molecular signal.
Following reception, detection of virus requires recognition events that convert the viral stimulus into a molecular signal. This conversion is the defining feature of GO:0009597. In diagnostic assays, recognition is mediated by sequence-specific probes or CRISPR-Cas effectors, as demonstrated for respiratory syncytial virus using RT-RPA and CRISPR-Cas12a and for cucurbit chlorotic yellows virus using RT-LAMP. In clinical virology, PCR-based recognition distinguishes influenza C virus from influenza D virus in Scottish respiratory samples. In host biology, the same conceptual step corresponds to sensing of viral components and initiation of signaling, which is inferred from the detection of viral RNA in patient samples such as the study of tick-borne encephalitis virus RNA in blood, urine, or saliva.
Amplification and readout
In simple terms: The signal is amplified so it can be observed or measured.
Detection of virus typically includes amplification and readout to make the signal detectable. Isothermal amplification strategies such as RT-RPA and RT-LAMP are used for respiratory syncytial virus and cucurbit chlorotic yellows virus, respectively. In surveillance workflows, amplification and readout are applied to environmental samples for Japanese encephalitis virus and to mosquito pools for arboviruses. In transplant medicine, readout of respiratory virus detection informs clinical decision-making in pediatric hematopoietic cell transplant patients. The absence of detectable signal, as reported for tick-borne encephalitis virus RNA in blood, urine, or saliva, is also an informative readout of the detection process.
Host range and context dependence
In simple terms: Different hosts and sample types change how detection works.
Detection of virus is context dependent, varying with host species, sample matrix, and virus family. Plant-associated detection is illustrated by potato virus S in Colorado potato beetle RNA-seq data, while vector-borne detection is illustrated by arboviruses in mosquitoes. Environmental detection is exemplified by Japanese encephalitis virus in piggery effluent. Clinical detection spans respiratory samples for influenza C virus and respiratory syncytial virus, as well as blood, urine, and saliva for tick-borne encephalitis virus. Host immune status further modulates detection outcomes, as shown by respiratory virus detection in pediatric hematopoietic cell transplant patients.
Interpretation and limitations
In simple terms: A detection result must be interpreted in its biological and clinical context.
The final stage of detection of virus is interpretation, which requires understanding of assay sensitivity, sample timing, and host factors. Negative results, such as no detection of tick-borne encephalitis virus RNA in blood, urine, or saliva of hospitalized immunocompetent patients, must be interpreted alongside sampling limitations. Positive results in asymptomatic individuals, as observed in pediatric hematopoietic cell transplant patients, complicate attribution of symptoms to viral detection. Cross-species and environmental detections, including potato virus S in Colorado potato beetle RNA-seq data and Japanese encephalitis virus in piggery effluent, require careful ecological interpretation. Assay choice, such as RT-RPA/CRISPR-Cas12a, RT-LAMP, or PCR, influences both sensitivity and specificity of detection of virus.
Key Genes Involved in GO:0009597 detection of virus
The following genes and proteins are representative of the host and assay machinery involved in detection of virus, based on the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| Cas12a | CRISPR effector used for sequence-specific detection of viral nucleic acid | Enables RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus |
| RT (reverse transcriptase) | Converts viral RNA into cDNA for amplification | Core component of RT-RPA and RT-LAMP assays for respiratory syncytial virus and cucurbit chlorotic yellows virus |
| RPA components | Isothermal amplification of viral nucleic acid | Used in RT-RPA detection of respiratory syncytial virus |
| LAMP primers | Isothermal amplification of viral RNA | Used in RT-LAMP detection of cucurbit chlorotic yellows virus |
| PCR primers/probes | Sequence-specific amplification and detection | Used for detection of influenza C virus in Scottish respiratory samples |
| Viral RNA-dependent RNA polymerase | Viral genome replication and template for detection | Target of nucleic acid detection in tick-borne encephalitis virus studies |
| Viral structural proteins | Form virions and present viral stimuli | Relevant to reception stage of detection of virus |
| Host innate immune sensors | Recognize viral nucleic acids and initiate signaling | Conceptual basis for detection of virus as a biological_process |
| Interferon-stimulated genes | Amplify antiviral signaling after detection | Downstream of detection of virus in host responses |
| Mosquito vector factors | Support arbovirus replication and detection in vectors | Relevant to detection of arboviruses in mosquitoes |
| Plant virus coat protein | Encapsidates potato virus S RNA | Detected in Colorado potato beetle RNA-seq data |
| Japanese encephalitis virus proteins | Viral components detected in environmental samples | Relevant to surveillance in piggery effluent |
| Influenza C virus proteins | Distinguish influenza C from influenza D | Relevant to respiratory sample detection |
| Cucurbit chlorotic yellows virus proteins | Viral targets of RT-LAMP | Relevant to plant virus detection |
| Respiratory syncytial virus proteins | Viral targets of RT-RPA/CRISPR-Cas12a | Relevant to clinical detection |
| Tick-borne encephalitis virus proteins | Viral targets in blood, urine, and saliva | Relevant to negative detection studies |
| Chikungunya virus proteins | Viral targets in mosquito surveillance | Relevant to arbovirus detection |
| Potato virus S proteins | Viral targets in insect RNA-seq | Relevant to cross-species detection |
How Is detection of virus Regulated?
Detection of virus is regulated at multiple levels, including assay design parameters and host biological state. In diagnostic contexts, the choice of amplification chemistry, such as RT-RPA with CRISPR-Cas12a or RT-LAMP, determines sensitivity and specificity. Host immune status influences detection outcomes, as shown by respiratory virus detection in pediatric hematopoietic cell transplant patients. Sample type and timing regulate whether viral RNA is detectable, as illustrated by the absence of tick-borne encephalitis virus RNA in blood, urine, or saliva of hospitalized immunocompetent patients. Environmental and vector factors also regulate detection, including arbovirus circulation in mosquitoes and Japanese encephalitis virus in piggery effluent. Cross-species transmission and RNA-seq detection, such as potato virus S in Colorado potato beetle, further modulate detection of virus. PCR-based differentiation of influenza C from influenza D virus exemplifies how assay specificity regulates the interpretation of detection of virus.
detection of virus and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| RSV targets | Respiratory syncytial virus infection | RT-RPA/CRISPR-Cas12a detection assay |
| Influenza C virus targets | Respiratory viral infection | PCR-based detection in respiratory samples |
| Tick-borne encephalitis virus targets | Neurotropic viral infection | Blood, urine, and saliva RNA detection |
| Japanese encephalitis virus targets | Vector-borne zoonotic disease | Environmental and piggery effluent surveillance |
| Chikungunya virus targets | Arboviral disease | Mosquito pool detection |
Respiratory viral infections and transplant complications
Detection of virus is directly relevant to respiratory viral infections, including respiratory syncytial virus, which can be detected by RT-RPA/CRISPR-Cas12a. In pediatric hematopoietic cell transplant patients, both asymptomatic and symptomatic respiratory virus detection occur, complicating clinical management. Influenza C virus detection in Scottish respiratory samples further illustrates the respiratory disease context. These studies show that detection of virus is not only a diagnostic endpoint but also a determinant of clinical decision-making in vulnerable populations.
Neurotropic and vector-borne viral diseases
Detection of virus is central to neurotropic and vector-borne viral diseases. Tick-borne encephalitis virus RNA was not detected in blood, urine, or saliva of hospitalized immunocompetent patients, highlighting the challenges of non-invasive detection. Japanese encephalitis virus surveillance in piggery effluent and environmental samples provides a complementary tool for outbreak detection. Arbovirus detection in mosquitoes, including chikungunya virus, demonstrates the role of vector surveillance in disease control. Together, these studies link detection of virus to public health responses for neurotropic and vector-borne pathogens.
Plant and agricultural viral diseases
Detection of virus extends to plant and agricultural systems. Potato virus S was detected in Colorado potato beetle RNA-seq data, indicating cross-species detection relevant to crop protection. Cucurbit chlorotic yellows virus was detected by RT-LAMP, providing a rapid tool for plant disease management. These examples show that detection of virus is a broadly conserved concept applicable to plant virology and agricultural biosecurity.
From detection of virus-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate host gene required for detection of virus? | CRISPR knockout cell model |
| Does a point mutation in a sensor alter viral detection? | CRISPR point-mutation cell model |
| Can a reporter gene be inserted to monitor detection of virus? | CRISPR knock-in reporter cell model |
| Does overexpression of a sensor enhance detection of virus? | CRISPR overexpression cell model |
| Which host genes are essential for detection of virus? | CRISPR library screening |
| How does viral detection change transcriptomes? | RNA-seq and bioinformatics analysis |
How to Study the detection of virus Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RT-RPA/CRISPR-Cas12a | Viral nucleic acid presence | Detection of respiratory syncytial virus |
| RT-LAMP | Viral RNA amplification | Detection of cucurbit chlorotic yellows virus |
| RT-PCR | Viral RNA presence and subtype | Detection of influenza C virus |
| RNA-seq | Viral and host transcripts | Detection of potato virus S in insect RNA-seq |
| Environmental surveillance | Viral RNA in water and effluent | Detection of Japanese encephalitis virus |
| Mosquito pool testing | Arbovirus presence in vectors | Detection of chikungunya virus |
| Clinical specimen testing | Viral RNA in patient samples | Respiratory virus detection in transplant patients |
| Blood, urine, saliva testing | Viral RNA in body fluids | Tick-borne encephalitis virus detection study |
Nucleic acid amplification assays
Detection of virus is frequently studied using nucleic acid amplification methods. RT-RPA combined with CRISPR-Cas12a enables detection of respiratory syncytial virus. RT-LAMP provides real-time detection of cucurbit chlorotic yellows virus. PCR-based assays detect influenza C virus in Scottish respiratory samples. These methods measure the presence of viral nucleic acid and are foundational for both clinical and environmental detection of virus.
RNA-seq and transcriptomic detection
RNA-seq is used to detect viral sequences in complex samples. Potato virus S was detected in Colorado potato beetle RNA-seq data, demonstrating cross-species detection. Transcriptomic approaches can also reveal host responses downstream of detection of virus, as inferred from respiratory virus detection studies in transplant patients. RNA-seq is therefore a versatile method for both virus discovery and host gene expression analysis.
Environmental and vector surveillance
Environmental and vector surveillance methods apply detection of virus to public health. Japanese encephalitis virus was detected in piggery effluent and environmental samples as a complementary outbreak detection tool. Arboviruses, including chikungunya virus, were detected in mosquitoes. These methods measure viral presence in non-clinical matrices and inform vector control and outbreak preparedness.
Clinical specimen testing
Clinical specimen testing is a direct application of detection of virus. Respiratory virus detection in pediatric hematopoietic cell transplant patients reveals asymptomatic and symptomatic infections. Tick-borne encephalitis virus RNA was not detected in blood, urine, or saliva of hospitalized immunocompetent patients, illustrating the importance of specimen choice. These studies measure viral presence in human samples and guide patient management.
How CRISPR Can Be Used to Study GO:0009597 detection of virus
Knockout
CRISPR knockout models are used to test whether candidate host genes are required for detection of virus. By disrupting a gene of interest, researchers can measure changes in viral sensing or assay readout. This approach is conceptually aligned with studies that detect viral nucleic acids, such as RT-RPA/CRISPR-Cas12a for respiratory syncytial virus, where the CRISPR effector itself is a detection component. Knockout models help establish causality between host factors and detection of virus.
Point Mutation
CRISPR point-mutation models introduce precise amino acid changes to dissect domains required for detection of virus. Such models are useful when a sensor or assay protein has a catalytic or binding residue whose function must be separated from scaffolding roles. The precision of point mutation complements detection assays such as RT-LAMP and PCR, where single-nucleotide specificity is critical.
Knock-in
CRISPR knock-in models insert reporters or tags to monitor detection of virus in real time. Tagged knock-in of a sensor gene allows visualization of signal conversion, the defining feature of GO:0009597. This approach parallels the use of CRISPR-Cas12a in detection assays, where the effector is engineered into a readout system. Knock-in models are valuable for linking molecular events to measurable outputs.
Overexpression
CRISPR overexpression models increase the abundance of a candidate gene to test whether it enhances detection of virus. Overexpression can reveal rate-limiting steps in viral sensing and can boost assay sensitivity. This strategy is relevant to diagnostic contexts such as respiratory virus detection in transplant patients, where sensitivity affects clinical interpretation. Overexpression models complement knockout and knock-in approaches for a comprehensive understanding of detection of virus.
How EDITGENE Supports detection of virus Research
Researchers studying detection of virus-related genes often need to determine whether a candidate gene is causally involved in viral perception or whether it is merely correlated with infection. Establishing causality requires precise genetic perturbation, which is where EDITGENE's CRISPR services support hypothesis-driven virology and diagnostic assay development.
Contact EDITGENE today to design your custom CRISPR model for detection of virus research.
Frequently Asked Questions About detection of virus
What is GO:0009597 detection of virus?
GO:0009597 detection of virus is a Gene Ontology biological_process defined as the series of events in which a stimulus from a virus is received and converted into a molecular signal, with the synonym perception of virus.
What genes are involved in detection of virus?
Genes and proteins involved in detection of virus include CRISPR effectors such as Cas12a used in RT-RPA/CRISPR-Cas12a assays, reverse transcriptase and isothermal amplification components, PCR primers and probes, and host innate immune sensors that recognize viral nucleic acids.
How is detection of virus studied experimentally?
Detection of virus is studied using nucleic acid amplification assays such as RT-RPA/CRISPR-Cas12a, RT-LAMP, and PCR, as well as RNA-seq, environmental surveillance, vector testing, and clinical specimen testing.
Why is detection of virus important in transplant patients?
Detection of virus is important in transplant patients because both asymptomatic and symptomatic respiratory virus detections occur in pediatric hematopoietic cell transplant recipients, affecting clinical management.
Can detection of virus be negative in neurotropic infections?
Yes, tick-borne encephalitis virus RNA was not detected in blood, urine, or saliva of hospitalized immunocompetent patients, showing that negative detection results depend on specimen and timing.
What is the role of CRISPR-Cas12a in detection of virus?
CRISPR-Cas12a is used as a sequence-specific effector in RT-RPA assays for detection of respiratory syncytial virus, converting viral nucleic acid recognition into a detectable signal.
How does RT-LAMP contribute to detection of virus?
RT-LAMP enables real-time detection of cucurbit chlorotic yellows virus, providing a rapid isothermal method for plant virus detection.
Is detection of virus relevant to environmental surveillance?
Yes, Japanese encephalitis virus has been detected in piggery effluent and environmental samples as a complementary tool for outbreak detection, and arboviruses including chikungunya virus have been detected in mosquitoes.
What sample types are used for detection of virus?
Sample types include respiratory samples, blood, urine, and saliva, environmental water and effluent, mosquito pools, and insect RNA-seq samples.
How can CRISPR models help study detection of virus?
CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of candidate genes, while CRISPR library screening identifies host factors required for detection of virus, complementing diagnostic assays.
Conclusion
GO:0009597 detection of virus is a foundational biological_process that links viral recognition to molecular signaling and to practical diagnostic and surveillance applications. The cited literature demonstrates its breadth, from RT-RPA/CRISPR-Cas12a detection of respiratory syncytial virus and RT-LAMP detection of cucurbit chlorotic yellows virus to clinical studies in transplant patients and negative findings in tick-borne encephalitis virus body fluid testing. Environmental and vector surveillance further extend the term's relevance, while cross-species RNA-seq detection illustrates its versatility. For researchers, precise CRISPR models and bioinformatics pipelines are essential to move from correlation to causation in detection of virus studies.
References
- 1. Khamwut A et al.. 2025. Detection of respiratory syncytial virus based on RT-RPA and CRISPR-Cas12a.. Exp Biol Med (Maywood) 250:10387 PMID: 40375877
- 2. Schuster JE et al.. 2020. Frequency of asymptomatic and symptomatic respiratory virus detection in pediatric hematopoietic cell transplant patients.. Pediatr Transplant 24(6):e13732 PMID: 32418305
- 3. Antonets M et al.. 2025. Detection of potato virus S in Colorado potato beetle RNA-seq data.. Virus Genes 61(5):596-602 PMID: 40736785
- 4. Quarsten H et al.. 2024. No detection of tick-borne encephalitis virus RNA in blood, urine or saliva of hospitalised immunocompetent tick-borne encephalitis patients.. PLoS One 19(6):e0305603 PMID: 38913668
- 5. Ahmed W et al.. 2025. Surveillance of Japanese encephalitis virus in piggery effluent and environmental samples: a complementary tool for outbreak detection.. Appl Environ Microbiol 91(9):e0089525 PMID: 40833110
- 6. Bakhshi H et al.. 2020. Detection of arboviruses in mosquitoes: Evidence of circulation of chikungunya virus in Iran.. PLoS Negl Trop Dis 14(6):e0008135 PMID: 32603322
- 7. Smith DB et al.. 2016. Detection of influenza C virus but not influenza D virus in Scottish respiratory samples.. J Clin Virol 74:50-3 PMID: 26655269
- 8. Martínez-Fernández Á et al.. 2026. Real-time detection of cucurbit chlorotic yellows virus by RT-LAMP.. J Virol Methods 339:115262 PMID: 40935116
