Bacterial Adhesion Assay
Bacterial Adhesion Assay - Related Videos
05:57
In Vitro Assay of Bacterial Adhesion onto Mammalian Epithelial Cells
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Cited by 81 •
2011
This protocol is a simple bacterial adhesion assay consisting in counting the numbers of bacterial colony forming units that are adhered onto cultured cells. The assay is robust, independent of the adhesin studied, and numerous variations are used in most laboratories working on bacterial pathogenesis.
13:28
Introducing Shear Stress in the Study of Bacterial Adhesion
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Cited by 9 •
2011
During the infection process, a key step is the adhesion of pathogens with host cells. In most instances this adhesion step occurs in the presence of mechanical stress generated by flowing liquid. We describe a technique that introduces shear stress as an important parameter in the study of bacterial adhesion.
02:44
In Vitro Gut Model to Assess Bacterial Adhesion and Internalization
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2026
Source: Calatayud Arroyo, M., et al. Assessing the Viability of a Synthetic Bacterial Consortium on the In Vitro Gut Host-microbe Interface. J. Vis. Exp. (2018).This video demonstrates an in vitro gut host–microbe model to study bacterial viability. A co-culture of Caco-2 and HT29-MTX cells is incubated with bacteria pre-treated under simulated digestive conditions. Epithelial barrier integrity is assessed using transepithelial electrical resistance, and fractions from the medium, solubilized...
10:55
Assays for Studying the Role of Vitronectin in Bacterial Adhesion and Serum Resistance
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Cited by 1 •
2018
This report describes protocols for characterizing interactions between bacterial outer membrane proteins and the human complement regulator vitronectin. The protocols can be used to study the binding reactions and biological function of vitronectin in any bacterial species.
03:50
An In Vivo Model to Study Shear-Dependent Bacterial Adhesion
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2026
Source: Claes, J., et al, In Vitro and In Vivo Model to Study Bacterial Adhesion to the Vessel Wall Under Flow Conditions. J. Vis. Exp. (2015).This video demonstrates an in vivo method for analyzing shear-dependent bacterial adhesion in a live mouse model. Following surgical preparation and catheterization, the mesenteric vasculature is exposed for real-time imaging under a fluorescence microscope. Perfusion with an ionophore and fluorescently labeled bacteria reveals how shear stress triggers...
FAQs
Adhesion depends on both the bacterial strain and the context in which contact occurs. Environmental conditions, surface properties, and genetic changes can alter how many cells remain attached after exposure. Comparing these variables under controlled conditions helps distinguish changes in adhesive capacity from differences caused by the experimental setting rather than measurement variation.
In a Bacterial Adhesion Assay, washing is a critical separation step: it removes cells that did not remain attached, leaving the retained population for measurement. The chosen readout then estimates that population through viable colony counts, staining, microscopy, or optical density. Because these approaches measure attachment differently, comparisons should use the same method and conditions.
Attachment matters biologically because it contributes to colonization and can support biofilm formation. An assay can therefore connect differences in surface retention with broader questions about host-microbe interactions. Testing attachment to host cells or biomaterials separately can also reveal how the target context influences the observed adhesive phenotype.
A typical workflow begins by bringing bacteria into contact with a defined surface, host cell, or biomaterial under controlled conditions. After contact, the target is washed to remove nonadherent cells, and the remaining attached bacteria are quantified. Keeping contact and washing conditions consistent is essential when comparing strains, surfaces, or genetic variants.
Researchers can use results to compare bacterial strains, evaluate the effect of genetic changes, or examine how surface properties and environmental conditions influence attachment. In biology, these comparisons help investigate infection-related colonization, host-microbe interactions, and biofilm-associated disease without treating adhesion as a fixed trait of every strain or surface.
Applications extend to biomaterial research and prevention strategies. Testing bacterial attachment on different materials can identify surface conditions associated with greater or reduced retention, while comparing altered systems can support evaluation of approaches intended to prevent biofilm-associated disease. The assay links a measurable attachment outcome to practical questions about material design and disease prevention.