Intestinal Colonization
Intestinal Colonization - Related Videos
03:22
Evaluating Intestinal Bacterial Colonization in Germ-Free C. elegans
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2025
Source: Taylor, M. N., et.al. Using Single-Worm Data to Quantify Heterogeneity in Caenorhabditis elegans-Bacterial Interactions. J. Vis. Exp. (2022)This video demonstrates the exposure of germ-free, age-matched Caenorhabditis elegans worms to a bacterial strain for intestinal colonization. It explains the selective removal of non-adhered and external bacteria, leaving only viable bacteria adhered to the gut epithelium for quantification.
02:30
Intestinal Colonization and Diarrhea Induction by Vibrio cholerae in Adult Zebrafish
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2026
Source: Nag, D., et.al. Quantifying Vibrio cholerae Colonization and Diarrhea in the Adult Zebrafish Model. J. Vis. Exp. (2018)This video demonstrates the inoculation of adult zebrafish with a pathogenic Vibrio cholerae strain to study intestinal colonization and disease outcomes. It shows how bacterial toxins disrupt intestinal integrity, leading to fluid leakage, mucus secretion, and watery diarrhea before the fish are prepared for further analysis.
04:00
Generation of Mouse Proximal Colon Loop Model: A Surgical Procedure to Generate Proximal Colon Loop and Measure Intestinal Permeability by Detection of Fluorescent Markers in Serum Following Intraluminal Injection
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2025
In this video, we describe a surgical procedure to generate mouse proximal colon loop or pcLoop segment followed by intraluminal injection of fluorescent markers into the segment to study the intestinal epithelial permeability.
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.
10:58
A Protocol for Lentiviral Transduction and Downstream Analysis of Intestinal Organoids
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Cited by 81 •
2015
In this video protocol we give a step by step explanation of lentiviral transduction in organoids of primary intestinal epithelium and of processing and downstream analysis of these cultures by quantitative RT-PCR, RNA-microarray and immunohistochemistry.
FAQs
Persistence depends on whether a microorganism can tolerate and use the conditions at a particular intestinal site. Oxygen availability, pH, bile salts, nutrient supply, and immune defenses create local pressures that favor some populations over others. These factors help explain why colonizing communities differ between sites and why changes in the intestinal environment can alter which microorganisms remain established.
Attachment to mucus or epithelial surfaces helps microorganisms remain associated with intestinal tissues rather than being displaced from suitable sites. After reaching these locations, microbes must adapt to local chemical conditions and available nutrients. Together, attachment and adaptation determine whether a population can maintain contact with the host and continue interacting with surrounding microbial communities.
Microbial populations do not persist independently of one another. Competition can limit access to nutrients or suitable locations, while cooperation can support coexistence among species within the same community. These interactions influence which populations become established and how the overall microbiota is maintained, making community relationships an important part of intestinal colonization biology.
A useful study considers where microorganisms are found, how they associate with mucus or epithelial surfaces, and how they respond to oxygen, pH, bile salts, nutrients, and immune defenses. Researchers can also examine interactions with resident microbial communities. Together, these observations connect microbial presence with the environmental and biological conditions that support persistence.
Colonization research helps explain how microorganisms establish themselves within the gastrointestinal tract and interact with resident communities and host tissues. That knowledge supports studies of probiotics, infectious disease, and antibiotic-associated disruption. It can reveal why particular microbial populations persist, how community balance changes, and which biological relationships may be relevant to health or disease.
The microbial communities established in the intestine are relevant to barrier function, host metabolism, and immunity. Studying colonization connects the presence and persistence of microorganisms with these host processes, while also accounting for environmental conditions and microbial interactions. This biological context supports research into microbiome-based approaches to health and disease.