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Pandoravirus yedoma is a virus that originated 48,500 years ago which was discovered in the deep Siberian permafrost in 2022. The scientists also revived 13 new pathogens and characterized them as 'zombie viruses'. It has been shown to infect amoeba cells (particularly A. castellanii) killing them in the process. [1] [2]
The amoebas started dying and, when examined, were found to contain giant virus specimens. The authors said they got the idea to probe permafrost samples for new viruses after reading about an experiment that revived a similar aged seed of Silene stenophylla two years earlier. [ 2 ]
Ancient “zombie viruses” frozen in melting Arctic permafrost could fuel a new pandemic if unleashed by climate change, scientists have warned.. Global heating is enabling increased human ...
Also in 2014, two ~30,000 years old giant virus species, Pithovirus sibericum [10] and Mollivirus sibericum, [11] were discovered in the Siberian permafrost and they retained their infectivity. Like the other giant viruses with large genomes , they are larger in size than most bacteria and pose no risk to humans, as they infect other ...
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Mollivirus sibericum is a spherical DNA virus with a diameter of 500–600 nanometers (0.5–0.6 μm). [1] [2] Mollivirus sibericum is the fourth ancient virus that scientists have found frozen in permafrost since 2003. [3] It has a sister taxon, Mollivirus kamchatka. [4]
Pandoravirus is a proposed genus of giant virus, first discovered in 2013. [5] It is the third largest in physical size of any known viral genus, behind Pithovirus and Megaklothovirus. [6]