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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. [ 1 ] [ 2 ] All known giant viruses belong to the phylum Nucleocytoviricota . [ 3 ]
When the virus replicates faster than the immune system can control, it can destroy cells and harm the body, and it can even incite an over-zealous immune reaction that can cause other damage.
It is widely held to be the world's most massive single organism. This article lists the largest organisms for various types of life and mostly considers extant species, [a] which found on Earth can be determined according to various aspects of an organism's size, such as: mass, volume, area, length, height, or even genome size.
In general, viruses are much smaller than bacteria and more than a thousand bacteriophage viruses would fit inside an Escherichia coli bacterium's cell. [39]: 98 Many viruses that have been studied are spherical and have a diameter between 20 and 300 nanometres.
Scientists made an unexpected discovery in a Massachusetts forest: a collection of “giant” viruses many times larger than typical viral specimens.
With a size of approximately 200 to 300 nm, M. genitalium is an ultramicrobacterium, smaller than other small bacteria, including rickettsia and chlamydia. However, the vast majority of bacterial strains have not been studied, and the marine ultramicrobacterium Sphingomonas sp. strain RB2256 is reported to have passed through a 220 nm (0.00022 ...
Megavirus [2] is a viral genus, phylogenetically related to Acanthamoeba polyphaga mimivirus (APMV). [3] In colloquial speech, Megavirus chilense is more commonly referred to as just "Megavirus".
In addition, it is larger than at least 30 cellular clades. [ 15 ] In addition to the large size of the genome, mimivirus possesses an estimated 979 protein-coding genes , far exceeding the minimum 4 genes required for viruses to exist ( c.f. MS2 and Qβ viruses). [ 16 ]