Viral Pathogen Detection
Viral Pathogen Detection - Related Videos
13:45
Using a Pan-Viral Microarray Assay (Virochip) to Screen Clinical Samples for Viral Pathogens
0 Views •
Cited by 84 •
2011
The Virochip is a pan-viral microarray designed to simultaneously detect all known viruses as well as novel viruses on the basis of conserved sequence homology. Here we demonstrate how to run a Virochip assay to analyze clinical samples for the presence of both known and unknown viruses.
01:29
Immune Response Against Viral Pathogens
0 Views •
2024
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses. NK Cells NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
03:17
A Mouse Model to Study the Pathogenic Transition of Streptococcus pneumoniae Following Viral Co-Infection
0 Views •
2026
Source: Lenhard, A. et al. A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness. J. Vis. Exp. (2022)This video demonstrates a mouse co-infection model in which the influenza virus triggers the transition of Streptococcus pneumoniae from a colonizer to a pathogen. It outlines the steps involved in bacterial colonization, viral infection, and disease progression.
10:16
Detection of Viral RNA by Fluorescence in situ Hybridization (FISH)
0 Views •
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.
12:54
Detection of Foodborne Bacterial Pathogens from Individual Filth Flies
0 Views •
Cited by 20 •
2015
A PCR-based protocol was adapted to detect Cronobacter spp., Salmonella enterica, and Listeria monocytogenes from body surfaces and alimentary canals of individual wild-caught flies. The goal of this protocol is to detect and isolate bacterial pathogens from individual insects collected as part of an environmental sampling program during foodborne outbreak investigations.
FAQs
These assay types target different evidence. Molecular tests detect viral nucleic acids, antigen-binding assays detect viral proteins, and antibody tests detect host immune responses associated with exposure. Consequently, molecular and antigen approaches address the presence of viral material, whereas antibody measurements help investigate immune exposure and responses to infection or vaccination in immunology and infection studies.
Sequence-specific primers or probes direct molecular tests toward selected viral genetic material. This targeting can distinguish one pathogen from another and supports identification when several viruses may be relevant to a sample. The approach is therefore useful for diagnostic testing and for characterizing emerging variants, where sequence differences provide important analytical information.
Viral load measurement provides an estimate of the amount of viral material detected rather than only indicating whether evidence is present. That additional measurement supports infection research and can help investigators characterize viral behavior in samples. In clinical and surveillance contexts, it contributes information for interpreting infection patterns and evaluating changes relevant to control efforts.
The appropriate approach depends on the evidence being sought and the sample context. Clinical, environmental, and research samples may call for detection of nucleic acids, viral proteins, or host antibodies. The intended purpose also matters: diagnosis and surveillance emphasize identifying viral evidence, while immunology studies may prioritize immune responses to infection or vaccination.
An investigation begins by defining the sample context and the evidence required, then selecting a molecular, antigen, or antibody-based approach. Sequence-specific primers or probes may be included when pathogen discrimination is needed. Results can subsequently support diagnosis, surveillance, infection-control decisions, variant characterization, or assessment of immune responses, depending on the study objective.
Detection results help identify viral evidence across relevant clinical or environmental samples, allowing investigators to support surveillance and examine the distribution of infection. Timely findings can inform infection-control actions and outbreak investigation. In parallel, identifying emerging variants and measuring viral load can provide additional context for monitoring transmission-related concerns and guiding antiviral strategy development.