Insgesamt 13 neuen Viren fanden Forscher unter dem Permafrost Sibiriens.
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Morphological features guiding the early identification of newly isolated viruses (Negative staining, Transmission Electron Microscopy). (A) The large ovoid particle (1,000 nm in length) of Pandoraviruses with its characteristic apex ostiole (white arrowhead). (B) A mixture of Pandoravirus particles and Megavirus icosahedral particles exhibiting a “stargate” (white starfish-like structure crowning a vertex, white arrowhead). (C) The elongated particle of a Cedratvirus (1,500 nm in length) exhibits two apex cork-like structures (white arrowheads). (D) The elongated particle of a Pithovirus (1,900 nm in length) exhibits a single apex cork-like structure (white arrowhead). (E) The large (770 nm in diameter) “hairy” icosahedral particle of a Megavirus, with its prominent “stargate” (whaite arrowhead). (F) The smaller icosahedral particle (200 nm in diameter) typical of Asfarviruses/Pacmanviruses.
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