Pathogen Localization
Pathogen Localization - Related Videos
09:52
A Mouse Model for Pathogen-induced Chronic Inflammation at Local and Systemic Sites
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Cited by 15 •
2014
Animal models have proven to be invaluable tools in defining host and pathogen specific mechanisms that contribute to the development of chronic inflammation. Here we describe a mouse model of oral infection with the human pathogen Porphyromonas gingivalis and detail methodologies to assess the progression of inflammation at local and systemic sites.
09:54
Methods for Rapid Transfer and Localization of Lyme Disease Pathogens Within the Tick Gut
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Cited by 28 •
2011
Lyme disease research studies often require generation of ticks infected with the pathogen Borrelia burgdorferi, a process that typically takes several weeks. Here we demonstrate a microinjection-based tick infection procedure that can be accomplished within hours. We also demonstrate an immunofluorescence method for in situ localization of B. burgdorferi within ticks.
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.
02:35
High-Resolution Confocal Imaging of Pathogen-Infected Drosophila Hemocytes
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2026
Source: Hiroyasu, A., et al. Extraction of Hemocytes from Drosophila melanogaster Larvae for Microbial Infection and Analysis. J. Vis. Exp. (2018)This video demonstrates high-resolution confocal imaging of Drosophila melanogaster hemocytes infected with Coxiella burnetii to visualize pathogen localization in 3D, enabling detailed analysis of intracellular infection dynamics and host-pathogen interactions.
11:18
Infection of Zebrafish Embryos with Intracellular Bacterial Pathogens
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Cited by 234 •
2012
Transparent zebrafish embryos have proved useful model hosts to visualize and functionally study interactions between innate immune cells and intracellular bacterial pathogens, such as Salmonella typhimurium and Mycobacterium marinum. Micro-injection of bacteria and multi-color fluorescence imaging are essential techniques involved in the application of zebrafish embryo infection models.
FAQs
Spatial detection can show whether an infectious agent remains outside cells or occurs within them. Researchers interpret pathogen-specific fluorescent-antibody or nucleic-acid signals in relation to cellular boundaries, using microscopy or in situ hybridization while preserving the surrounding tissue or cellular context. This distinction helps identify cellular targets and clarifies which host compartments contain the infection.
Specificity comes from labels designed to recognize pathogen-associated targets: fluorescent antibodies bind pathogen-specific proteins, whereas nucleic-acid probes detect pathogen genetic material. The detection method must therefore be matched to the component being sought. Combining these labels with microscopy or in situ hybridization links a visible signal to the infectious agent while retaining its location.
Tissue tropism, meaning the distribution of an infectious agent among host tissues or cell types, becomes interpretable when localization preserves where the signal occurs. Mapping that distribution can reveal preferred tissues and cellular targets, then allow comparison with immune responses or disease symptoms. The result connects pathogen presence to biological effects rather than treating detection as location-free.
Investigators apply a selective fluorescent antibody or nucleic-acid probe to a host, tissue, cell, or environmental sample. They then use microscopy or in situ hybridization to detect the pathogen-specific protein or genetic material. Preserving spatial context throughout these steps allows the resulting signal to be interpreted against the sample’s anatomical or cellular organization.
Microscopy is useful when the research question depends on seeing pathogen signals in relation to cells or tissue structure. It can support distinctions between extracellular and intracellular organisms and help identify cellular targets. Because the approach retains spatial information, investigators can examine distribution alongside immune responses or disease symptoms rather than evaluating pathogen detection without spatial context.
Localization data can indicate where infection occurs and how its distribution relates to disease progression. In diagnosis, that information helps identify the presence and location of infectious agents. In targeted-therapy studies, spatial evidence supports evaluation of treatment effects in pathogen-containing sites, while pathogenesis and transmission research uses distribution patterns to investigate disease development and spread.