Phage Host Interaction
Phage Host Interaction - Related Videos
03:04
Atomic Force Microscopy to Visualize Phage–Antigen Interactions
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2026
Source: Williams, S. M. et al. Novel Atomic Force Microscopy Based Biopanning for Isolation of Morphology Specific Reagents against TDP-43 Variants in Amyotrophic Lateral Sclerosis. J. Vis. Exp. (2015)This video demonstrates tapping-mode AFM to visualize phage–antigen interactions on a mica surface. It outlines the steps for antigen immobilization, phage binding, and high-resolution nanoscale imaging.
04:30
Phage Purification from Borrelia burgdorferi
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2026
Source: Eggers, C. H. Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi. J. Vis. Exp. (2022).This video demonstrates the isolation of borrelial phage particles from a Borrelia burgdorferi suspension using polyethylene glycol-mediated phase separation. The sample is centrifuged, treated with a salt solution, and a molecular crowding agent to precipitate phages. Chloroform extraction is done to remove debris and concentrate phage particles. The purified phage...
12:22
Biomimetic Materials to Characterize Bacteria-host Interactions
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Cited by 8 •
2015
Bacterial attachment to host cells is a key step during host colonization and infection. This protocol describes the generation of polymer-coupled recombinant adhesins as biomimetic materials which allow analysis of the contribution of individual adhesins to these processes, independent of other bacterial factors.
10:52
Precise Phage Mutagenesis with NgTET-Assisted CRISPR-Cas Systems
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2025
Here, we present a protocol to reduce DNA modifications in bacteriophages using the NgTET enzyme, enabling efficient and scarless CRISPR-Cas mutagenesis. This method facilitates the genetic engineering of phages for applications in biotechnology and phage therapy.
02:46
A Phage Therapy against Pseudomonas aeruginosa Infection in Zebrafish Embryos
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2025
The video demonstrates the phage therapy technique targeting Pseudomonas aeruginosa infection in cystic fibrosis zebrafish embryos. Phage therapy effectively diminishes bacterial load and mitigates proinflammatory immune responses in CF zebrafish embryos infected with bacteria, leading to reduced CF embryo lethality.
FAQs
Attachment proteins recognize particular receptors on a bacterial cell surface, so adsorption depends on molecular compatibility between the phage and host. This specificity helps determine host range, meaning the set of bacteria susceptible to infection. Studying receptor recognition therefore explains why related bacteria may differ in vulnerability and supports efforts to target selected bacterial populations.
Following adsorption, the phage injects its genome into the bacterium. The viral genetic material then redirects host cellular machinery toward genome replication and production of phage components, followed by assembly of new particles. This sequence connects an initial surface-recognition event with the generation of progeny and, in many cases, destruction of the host cell.
Bacteria can counter infection through restriction systems or CRISPR-Cas immunity, which act as defenses against invading phage genetic material. These responses make the interaction a contest between viral replication and bacterial protection rather than a one-sided infection process. Their activity contributes to bacterial evolution and helps shape which phages successfully propagate in a population.
A useful analysis follows the interaction from receptor recognition and adsorption through genome injection, host-machinery redirection, replication, particle assembly, and possible cell lysis. Researchers can also examine bacterial restriction or CRISPR-Cas responses alongside these stages. Organizing observations in this order links molecular events to infection outcomes and clarifies where host defenses may act.
Because attachment depends on specific bacterial surface receptors, phages can be investigated as agents for targeted bacterial control. Understanding subsequent replication and lysis helps relate host recognition to the ability to produce new particles and affect bacterial cells. This knowledge supports phage therapy research and the engineering of phages intended to act against selected bacteria.
Phage-host studies reveal how viruses redirect cellular machinery, how bacteria evolve defensive systems, and how infection influences viral ecology and bacterial evolution. The same knowledge informs antimicrobial discovery and microbiome research, where interactions between phages and bacterial populations are relevant. These applications connect molecular infection mechanisms with changes in microbial communities and biological systems.