Gut Colonizing Pathogen
Gut Colonizing Pathogen - Related Videos
11:18
Automated Separation of C. elegans Variably Colonized by a Bacterial Pathogen
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Cited by 1 •
2014
The wormsorter facilitates genetic screens in Caenorhabditis elegans by sorting worms according to expression of fluorescent reporters. Here, we describe a new usage: sorting according to colonization by a GFP-expressing pathogen, and we employ it to examine the poorly understood role of pathogen recognition in initiating immune responses.
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.
02:12
In Vitro Batch-Culture Model to Mimic Colonic Fermentation by Human Gut Microbiota
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2025
Source: Ahmadi, S., et al. An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota. J. Vis. Exp. (2019).This video demonstrates a method for modeling gut microbial fermentation by incubating fecal samples with dietary fermentable fiber under anaerobic conditions to study metabolite production by gut microbiota.
01:27
Oral Infection Alters the Gut Microbiota in a Rat Model
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2026
Begin with a rat model with sutures tied around its upper molar teeth to support bacterial colonization.Repeatedly smear the sutures with a gum disease-causing oral pathogenic bacterium using a gel-like solution.The bacteria colonize the gum around the sutures.Colonization triggers inflammation and damages the tissues.The bacteria release toxins that diffuse through damaged tissues and enter the bloodstream.These circulating toxins reach the gut, cause inflammation, disrupt the epithelial...
04:09
An Ex Vivo Gut Organ Culture System to Study Host-Microbiota Interactions
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2025
In this video, we describe the methodology for setting up an ex vivo gut organ culture system to study the interactions between mouse intestinal tissue fragments and specific gut bacteria. The device consists of two pairs of input-output ports, the first connecting the intestinal tissue lumen and supplying the specific bacterial suspension into it, and the second continuously supplying media to the device's wells to maintain ex vivo tissue viability.
FAQs
Persistence requires several coordinated traits rather than a single capability. The microorganism must tolerate changing gastrointestinal conditions, attach to intestinal surfaces, compete for nutrients, and evade host defenses. These features work together: survival maintains access to the gut, attachment supports residence, nutrient competition affects microbial relationships, and defense evasion reduces removal. Their combined performance influences whether colonization is sustained.
Establishment in the gut does not by itself determine the severity of disease. Harm develops when the organism damages tissue, produces toxins, or triggers harmful inflammation that disrupts host physiology. This distinction matters because researchers must examine both persistence and the specific processes that convert residence into pathology, helping separate colonization from clinically important infection.
Competition for nutrients and disruption of microbial communities place the pathogen within an ecological setting, not just a host-pathogen encounter. Its success can alter the balance of organisms in the gastrointestinal tract, while changes in that community may affect host physiology. Studying these relationships helps explain why colonization and illness must be considered alongside the condition of the surrounding gut microbiota.
Research can connect several biological outcomes: establishment in the gastrointestinal tract, changes to microbial communities, altered host physiology, and disease-related inflammation or tissue damage. Comparing these outcomes helps distinguish simple persistence from harmful infection. It also clarifies how host defenses, microbial competition, and pathogen traits contribute to different patterns of host-microbe interaction.
The topic supports multiple practical goals rather than one type of intervention. Findings can guide diagnostic development, antimicrobial strategies, and vaccines, while also informing approaches designed to preserve or restore protective gut microbiota. Considering these options together is important because controlling the pathogen and maintaining beneficial microbial communities address complementary parts of the colonization and disease problem.
These organisms provide a model for examining how microorganisms establish persistent relationships with a host while competing within a microbial community. Their study also informs disease transmission, because persistence in the gastrointestinal tract is relevant to understanding how infection is maintained. This knowledge links pathogen traits and host defenses with broader patterns of microbial balance, health, and disease.