Gut Colonization
Gut Colonization - Related Videos
02:12
In Vitro Batch-Culture Model to Mimic Colonic Fermentation by Human Gut Microbiota
0 Views •
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.
03:20
Electrophysiological Recording from Colonic Afferent Nerves in an Ex Vivo Rat Colon
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2025
This video demonstrates a method to record the activity of colonic afferent nerves in an ex-vivo rat colon, cannulated at both ends and infused with saline to increase intraluminal pressure. As pressure increases, the nerve signal rises, indicating its stimulation.
15:27
Extracting DNA from the Gut Microbes of the Termite (Zootermopsis Angusticollis) and Visualizing Gut Microbes
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Cited by 18 •
2007
This video illustrates the technique for extracting DNA from the species of microbes resident in the termite hindgut. The preparation of a wet mount slide, which is useful for visualizing the gut microbial community is also illustrated, and a tour through the species-rich gut environment is given.
FAQs
Adhesion to the intestinal mucus layer can help microorganisms remain associated with the gut rather than being lost from the tract. Persistence also reflects interactions with the immune system, which can influence host-microbe relationships. Studying both interfaces helps explain why some microbial populations remain while others fail to establish.
Oxygen availability and nutrient use act as environmental filters within the gastrointestinal tract. Microorganisms that can obtain suitable nutrients under the prevailing oxygen conditions may persist, whereas others may be disadvantaged. These constraints help shape community succession, the changing composition of microbial populations over time, and the eventual structure of the gut community.
Competition determines how microorganisms interact when they occupy the same intestinal environment. Organisms may differ in their ability to obtain nutrients or maintain access to suitable sites, affecting which populations persist. These interactions contribute to community succession and help explain why changes in microbial communities can alter susceptibility to infection or disease.
Gut colonization research connects microbial community development with variation in host susceptibility to infection or disease. The organisms that persist, their interactions with one another, and their relationships with the mucus layer and immune system can influence host biology. This makes colonization a useful framework for studying differences in biological outcomes among hosts.
These interventions are studied because they can alter intestinal microbial communities and potentially support intestinal health. Research can examine how changes associated with probiotics, antibiotics, or diet affect which organisms persist, how communities develop, and how host-microbe relationships change. Their effects therefore provide a way to investigate factors that shape microbial establishment and persistence.
Studies of gut colonization help explain how microbiomes develop, how microbial communities function as ecosystems, and how microorganisms interact with their hosts. They also connect environmental conditions, community succession, and persistence with host biology. This broad perspective supports research on intestinal health while placing microbial establishment within the larger context of biology.