Giant virus
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A giant virus, sometimes referred to as a girus, is a very large virus, some of which are larger than typical bacteria. All known giant viruses belong to the phylum Nucleocytoviricota.
Cryo-EM images of the giant viruses CroV and APMV. (A) Cryo-electron micrograph of four CroV particles. (B) Single CroV particle with concave core depression (white arrow). (C) Single APMV particle. Scale bars in (A–C) represent 2,000 Å.
Several giant viruses (Megaklothovirus horridgei, Pithovirus sibericum, Klothovirus casanovai, and Mimivirus) compared to E. Coli bacterium and normal size virus (HIV)
Nucleocytoviricota
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Nucleocytoviricota is a phylum of viruses. Members of the phylum are also known as the nucleocytoplasmic large DNA viruses, which serves as the basis of the name of the phylum with the suffix -viricot
Giant virus
…sometimes referred to as a girus, is a very large virus, some of which are larger than typical bacteria. All known giant viruses belong to the phylum Nucleocytoviricota. While the exact criteria used in the scientific literature varies, giant viruses are usually defined as those with virions larger than 200-300 nanometers…
Smallpox virus virions TEM PHIL 1849