Giant Virus Visualization

Giant virus visualization is the use of imaging methods to observe unusually large viruses, their structural features, and interactions with host cells. Because these viruses can approach bacterial size, researchers combine light microscopy with electron microscopy to examine virion morphology, capsids, replication factories, and intracellular distribution, often using fluorescent labeling or high-resolution imaging. In biology, visualization helps distinguish giant viruses from smaller viral particles, clarify how they enter cells and reproduce, and reveal their relationships with hosts and other microorganisms. These observations support research on viral evolution, cell biology, ecology, and the boundaries of what defines a virus.

Giant Virus Visualization - Related Videos

Research

JoVE EoE - Viral Growth and Techniques

Isolation of a Single Giant Virus from a Mixed Viral Population Using Amoebae

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2026

Source: Sahmi-Bounsiar, D. et al. Single Cell Micro-aspiration as an Alternative Strategy to Fluorescence-activated Cell Sorting for Giant Virus Mixture Separation. J. Vis. Exp. (2019)This video demonstrates single-cell micro-aspiration to isolate and expand a single giant virus population from a mixed viral population using amoebae as host cells.

Amoeba-Based Enrichment of Giant Viruses from an Environmental Water Sample

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2026

Source: Bou Khalil, J. Y.,et al. A Rapid Strategy for the Isolation of New Faustoviruses from Environmental Samples Using Vermamoeba vermiformis. J. Vis. Exp. (2016)This video demonstrates the enrichment of giant viruses from an environmental water sample using amoeba-based co-culture to enable downstream detection and analysis.

Single Cell Micro-aspiration as an Alternative Strategy to Fluorescence-activated Cell Sorting for Giant Virus Mixture Separation

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Cited by 5 •

2019

Here, we describe a single cell micro-aspiration method for the separation of infected amoebae. In order to separate viral subpopulations in Vermamoeba vermiformis infected by Faustoviruses and unknown giant viruses, we developed the protocol detailed below and demonstrated its ability to separate two low-abundance novel giant viruses.

Visualizing Viral Structural Protein Assembly on Giant Unilamellar Vesicle Membranes

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2026

Source: Olety, B., et. al., Visualization of HIV-1 Gag Binding to Giant Unilamellar Vesicle (GUV) Membranes. J. Vis. Exp. (2016)This study demonstrates a fluorescence-based assay to observe the membrane-binding behavior of human immunodeficiency virus type-1 structural protein. Using synthetic giant unilamellar vesicles as model membranes, the assay visualizes protein recruitment and assembly, mimicking early steps of viral particle formation.

Visualization of HIV-1 Gag Binding to Giant Unilamellar Vesicle (GUV) Membranes

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Cited by 5 •

2016

We illustrate here an in vitro membrane binding assay in which interactions between HIV-1 Gag and lipid membranes are visually analyzed using YFP-tagged Gag synthesized in a wheat germ-based in vitro translation system and GUVs prepared by an electroformation technique.

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