Pathogen Exposure Assay
Pathogen Exposure Assay - Related Videos
09:08
Developing a Salivary Antibody Multiplex Immunoassay to Measure Human Exposure to Environmental Pathogens
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Cited by 11 •
2016
In the current climate of scarce resources, new technologies are emerging that allow researchers to conduct studies cheaper, faster and with more precision. Here we describe the development of a bead-based salivary antibody multiplex immunoassay to measure human exposure to multiple environmental pathogens simultaneously.
02:12
Muscle Necrosis Assay in C. elegans Induced by a Pathogenic Aeromonas Strain
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2026
Source: Chen, Y. et. al., Evaluating Virulence and Pathogenesis of Aeromonas Infection in a Caenorhabditis elegans Model. J. Vis. Exp. (2018)This video demonstrates a muscle necrosis assay in C. elegans (Caenorhabditis elegans) using pathogenic Aeromonas strains. By feeding green fluorescent protein (GFP)-expressing worms on Aeromonas-seeded plates, the assay models bacterial infection and reveals tissue damage through fluorescence imaging. The progressive loss of muscle structure and GFP...
10:39
Single Cell Measurements of Vacuolar Rupture Caused by Intracellular Pathogens
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Cited by 22 •
2013
We describe a method for tracking the endomembrane rupture elicited by the intracellular bacteria Shigella flexneri and Mycobacterium tuberculosis upon host cell invasion. Our assay makes use of CCF4, a host cytoplasmic FRET probe in live or fixed cells. This reporter is degraded by an enzyme activity present on the bacterial surface.
08:45
Assay for Pathogen-Associated Molecular Pattern (PAMP)-Triggered Immunity (PTI) in Plants
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Cited by 23 •
2009
A cell death-based assay for PTI in Nicotiana benthamiana plants is described.
13:45
Using a Pan-Viral Microarray Assay (Virochip) to Screen Clinical Samples for Viral Pathogens
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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.
FAQs
Antibody-based formats detect pathogen-specific antibodies generated by the host, so their signal can indicate an immune response associated with earlier or continuing contact. Antigen-detection formats instead measure pathogen components, while nucleic-acid methods identify pathogen genetic material through molecular amplification. This distinction matters because each readout provides a different type of evidence about host response or pathogen presence.
Target binding links biological recognition to a measurable result. In an enzyme-linked immunosorbent assay, binding is converted into an assay signal, whereas molecular formats use amplification to make nucleic-acid evidence measurable. The resulting signal serves as the experimental readout used to determine whether the selected pathogen-associated target was detected in the biological sample.
They connect evidence of contact with a measurable host response. Measuring these antibodies can support evaluation of immunity rather than only indicating that a pathogen-associated target was detected. In biology studies, this makes antibody-based assays useful for examining how exposure relates to immune responses across individuals, populations, or experimental infection models.
A basic workflow identifies the biological sample, selects a pathogen-associated target, applies the relevant recognition or amplification step, and measures the resulting signal. The selected format may measure antibodies, antigens, or nucleic acids. Keeping these stages conceptually separate helps connect the laboratory readout to evidence of exposure, an immune response, or pathogen detection.
Researchers can apply these assays at several scales. Individual samples can provide evidence relevant to infection or immunity, while population-level measurements support epidemiological analysis and transmission studies. The results can also contribute to outbreak monitoring by showing patterns of pathogen-related evidence across groups. This connects laboratory measurements with broader assessments of pathogen spread.
In experimental infection models, these assays help assess whether exposure is associated with a measurable immune response or detectable pathogen-related signal. The findings can be used to investigate host-pathogen interactions and evaluate how biological responses relate to infection. This application extends the technique beyond population analysis to focused studies of exposure and host biology.