Progressive Colonization Monitoring
Progressive Colonization Monitoring - Related Videos
07:54
Assessing Hepatic Metabolic Changes During Progressive Colonization of Germ-free Mouse by 1H NMR Spectroscopy
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Cited by 6 •
2011
A progressive colonization procedure is described to further assess its impact on the host hepatic metabolism. Colonization is monitored non invasively by evaluating the urinary excretion of microbial co-metabolites by NMR-based metabolic profiling while hepatic metabolism is assessed by High Resolution Magic Angle Spinning (HR MAS) NMR profiling of intact biopsy.
28:15
Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer
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Cited by 22 •
2010
Reduced/absent expression of Pms2 and/or ERCC1 in entire crypts is a frequent event within 10 cm on each side of colonic adenocarcinomas, likely the basis of a field defect with high mutability and progression to cancer. Deficiency in Ku86 or CcOI is much less frequent in these field defects.
02:32
Monitoring Bacterial Colonization of Arabidopsis thaliana Roots in a Soilless System
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2026
Source: Harris, S. L., et al. Monitoring Bacterial Colonization and Maintenance on Arabidopsis thaliana Roots in a Floating Hydroponic System. J. Vis. Exp. (2019)This video demonstrates a protocol for monitoring the colonization of root-associated bacteria on Arabidopsis thaliana seedlings grown in a soilless system. Following colonization, bacteria are dislodged by sonication, then diluted, plated, and incubated to form colonies that reflect bacterial attachment and 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.
08:15
Gastrointestinal Motility Monitor (GIMM)
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Cited by 36 •
2010
Evaluation of colonic motility in the guinea pig distal colon with the Gastrointestinal Motility Monitor (GIMM) is a straightforward and simple to learn approach to quantitatively evaluate propulsive motility in the gastrointestinal tract.
FAQs
Repeated measurements make the trajectory more informative than a single positive result. An early signal that declines may indicate transient presence, whereas increasing or sustained measurements support persistence and can raise concern for progression toward infection. Interpreting the trajectory helps researchers separate exposure from continuing microbial establishment under defined host or experimental conditions.
Monitoring should not rely on abundance alone. Tracking whether microorganisms are present, how much is detected, where they are distributed, and which microbial types are represented provides complementary evidence about colonization. Stable overall quantity could conceal a change in distribution or composition, so combining these measurements produces a more informative picture of the biological site.
Microbial measurements become more meaningful when aligned with host responses. A rising burden can be examined alongside immune activation and tissue damage to determine whether increasing microbial presence coincides with worsening biological effects. This linkage helps distinguish simple persistence from a process associated with disease and clarifies how host immunity relates to colonization status.
Culture-based assays, microscopy, and molecular detection provide alternative ways to follow the same longitudinal process. Including these approaches in a monitoring plan allows investigators to assess microbial presence and abundance through more than one type of measurement, while relating findings to distribution and composition. The selected readouts should match the experimental question and remain comparable across time.
A practical workflow begins by defining the host or biological site, the repeated observation points, and the microbial features to measure. Investigators then collect longitudinal results for presence, abundance, distribution, or composition and compare them with immune and clinical or experimental conditions. This organization makes changes over time interpretable rather than treating each measurement as isolated.
Progressive Colonization Monitoring is useful when testing antimicrobial or immune interventions. Measurements collected across the monitoring period can show whether microbial burden falls, persistence is interrupted, or distribution and composition change. Comparing these microbial trends with host responses helps determine whether an intervention affects colonization itself, the associated immune activation, or both.
In immunology and infection research, the key interpretation is the relationship between microbial burden and host outcome. Increasing burden may accompany tissue damage and immune activation, while persistent detection without clear progression may represent a different biological state. Following both sides of this relationship supports investigation of factors that permit persistence and patterns associated with progressive disease.