Bacterial Infection Tracking
Bacterial Infection Tracking - Related Videos
04:35
Tracking Bacterial Infection Dynamics in a Mouse Using Bioluminescence
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2025
Source: Valentine, M. E., et al. Generation of In-Frame Gene Deletion Mutants in Pseudomonas aeruginosa and Testing for Virulence Attenuation in a Simple Mouse Model of Infection. J. Vis. Exp. (2020)This video demonstrates the use of bioluminescence to visualize and compare the in vivo behavior of virulent and attenuated bacterial strains in mice. It outlines the preparation of bioluminescent bacterial suspensions and their intraperitoneal injection into mice. The virulent strain exhibits...
05:26
Reporter Enzyme Fluorescence Imaging for In Vivo Tracking of Bacterial Infection
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2025
This video demonstrates the reporter enzyme fluorescence (REF) imaging for in vivo detection of Mycobacterium tuberculosis infection. The infected mice are intraperitoneally injected with a substrate for REF imaging. Upon being hydrolyzed by bacterial β-lactamase enzyme, the substrate emits fluorescence, the detection of which aids evaluation of infection.
04:02
Photoconversion-Based Leukocyte Tracking in Bacterial-Infected Transgenic Zebrafish
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2025
This video demonstrates the tracking of leukocyte recruitment using transgenic zebrafish larvae expressing photoconvertible green fluorescent protein. Pre-injecting red fluorescent dye-labeled bacteria into the otic vesicle and inducing photoconversion enables observation of leukocytes' migration, phagocytosis, and dispersal throughout the body, providing valuable insights into immune response dynamics.
14:05
Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes
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Cited by 7 •
2013
Listeria monocytogenes is a Gram positive bacterial pathogen frequently used as a major model for the study of intracellular parasitism. Imaging late L. monocytogenes infection stages within the context of small-interfering RNA screens allows for the global study of cellular pathways required for bacterial infection of target host cells.
02:07
Bioluminescence Imaging to Track Bacterial Infection and Wound Healing in a Mouse Model
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2026
Source: Hunt, A. M. A., et al. Come to the Light Side: In Vivo Monitoring of Pseudomonas aeruginosa Biofilm Infections in Chronic Wounds in a Diabetic Hairless Murine Model. J. Vis. Exp.(2017).This video demonstrates the procedure for assessing infection clearance and healing progression in a wounded diabetic mouse using bioluminescent and microscopic images.
FAQs
The approach combines measurements collected at multiple time points with information about bacterial abundance, location, and spread. Culture, microscopy, molecular detection, and genetic or fluorescent labeling can reveal different aspects of the same infection. Comparing these observations under defined conditions helps researchers determine whether bacterial populations remain stable, redistribute, or change during infection.
Abundance alone cannot show where bacteria are concentrated or how they move through a host or environment. Pairing quantity with spatial information supports analysis of tissue distribution, colonization, and spread. This combined view helps researchers compare infection dynamics more accurately and relate bacterial changes to host defenses or antimicrobial treatment.
These approaches provide complementary evidence. Culture, microscopy, and molecular detection identify bacteria or their signals through different measurement strategies, while genetic or fluorescent labeling can help follow bacterial cells or signals in collected samples. Selecting among them depends on whether the study emphasizes detection, visualization, distribution, or changes in bacterial populations over time.
Researchers should compare observations obtained under defined conditions and use consistently collected samples across the time period being studied. Consistency makes differences in bacterial abundance, location, or spread easier to attribute to infection progression, antimicrobial treatment, or host defenses rather than to changes in the tracking conditions themselves.
A study generally begins by defining the infection conditions and the bacterial feature to monitor, such as abundance, location, spread, or response to treatment. Researchers then collect samples, apply an appropriate detection or labeling approach, and compare the resulting observations over time. The comparison can characterize colonization, transmission, tissue distribution, or population changes.
Tracking allows researchers to compare bacterial populations before and after defined treatment or host-defense conditions. Changes in abundance, location, or spread can indicate how infection dynamics respond in the studied system. These observations support evaluation of therapeutic strategies and help clarify whether bacterial populations change during interactions with antimicrobial treatment or host defenses.