Bacterial Infiltration
Bacterial Infiltration - Related Videos
03:03
Inoculating a Bacterial Pathogen into Arabidopsis Leaves via Vacuum Infiltration
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2026
Source: Rufián, J. S., et.al. Single-Cell Analysis of the Expression of Pseudomonas syringae Genes within the Plant Tissue. J. Vis. Exp. (2022)This video demonstrates a vacuum infiltration method to introduce a bacterial pathogen into Arabidopsis plant leaves. The approach uses a prepared bacterial suspension and vacuum pulses to enable uniform entry through stomata, resulting in controlled leaf infection.
11:50
Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
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Cited by 47 •
2015
Quantification of pathogen growth is a powerful tool to characterize various Arabidopsis thaliana (hereafter: Arabidopsis) immune responses. The method described here presents an optimized syringe infiltration assay to quantify the Pseudomonas syringae pv. maculicola ES4326 growth in adult Arabidopsis leaves.
06:44
Isolation of Brain-infiltrating Leukocytes
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Cited by 33 •
2011
A rapid method to obtain infiltrating leukocytes from the murine brain is described. This method utilizes a continuous Percoll gradient and discontinuous Ficoll gradient to select and purify the leukocyte-enriched layer. Isolated leukocytes may then be characterized by flow cytometric measurements.
02:12
Co-Infiltration Assay for Screening Pathogen Effectors that Suppress Plant RNA Silencing
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2026
Source: Shi, J., et al. Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens. J. Vis. Exp. (2020)This video demonstrates a co-infiltration assay for identifying pathogen effector proteins that suppress RNA silencing in Nicotiana benthamiana 16c. A fluorescent reporter and a candidate effector gene are delivered into plant leaves via Agrobacterium. Normally, RNA silencing degrades reporter transcripts, reducing fluorescence. Suppressor effectors...
14:24
Manufacturing of Three-dimensionally Microstructured Nanocomposites through Microfluidic Infiltration
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Cited by 4 •
2014
Three-dimensional (3D) microstructured composite beams are fabricated through the directed and localized infiltration of nanocomposites into 3D porous microfluidic networks. The flexibility of this manufacturing method enables the utilization of different thermosetting materials and nanofillers in order to achieve a variety of functional 3D reinforced nanocomposite macroscopic products.
FAQs
Adherence is an early enabling step because bacteria must remain associated with an epithelial surface before advancing through host barriers. Strong or sustained attachment can position organisms for subsequent barrier disruption and multiplication in a suitable environment. Examining this stage helps researchers distinguish simple surface exposure from processes more likely to produce tissue involvement and infection.
Motility can support movement toward or through host tissue, whereas tissue-degrading factors can damage the physical structures that normally restrict passage. These mechanisms may therefore promote infiltration through different routes, even though both weaken spatial separation between bacteria and deeper host environments. Comparing their contributions helps link specific microbial properties with the extent of barrier damage.
Pattern-recognition receptors detect microbial components and initiate inflammation while bacteria are interacting with or moving beyond host barriers. This recognition connects microbial presence to host responses such as leukocyte recruitment. The resulting inflammatory activity can help support pathogen clearance, while its relationship to barrier damage is important for interpreting how infection develops within affected tissues.
These studies can connect the location and extent of bacterial spread with microbial virulence, barrier damage, leukocyte recruitment, and pathogen clearance. Such relationships help explain how a localized exposure may develop into a broader infectious process. They also provide a framework for examining whether host responses are associated with containment, ongoing tissue involvement, or progression of disease.
Tracking infiltration places antimicrobial responses in the context of where bacteria are located and how far they have moved through host tissues. Researchers can therefore relate microbial spread to host detection, inflammation, and clearance rather than evaluating antimicrobial activity in isolation. This perspective supports analysis of why infection remains localized in some settings but progresses in others.
A mechanistic view identifies several points that may influence invasion: bacterial adherence, movement, tissue-degrading activity, multiplication, microbial detection, and leukocyte recruitment. Studying these linked events can help researchers determine which stages are associated with barrier damage or successful clearance. That knowledge supports the development and evaluation of approaches intended to restrict bacterial spread through host tissues.