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Marine viruses are defined by their habitat as viruses that are found in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. Viruses are small infectious agents that can only replicate inside the living cells of a host organism , because they need the replication machinery of the host to ...
[8] [10] In 2020, reassortment (genetic "swapping") between these H5-2.3.4.4b viruses and other strains of avian influenza led to the emergence of a H5N1 strain with a H5-2.3.4.4b gene. [8] The virus then spread across Europe, first detected there in the autumn of 2020, before spreading to Africa and Asia. [1]
Mirny Station, Antarctica 1823 Shipwreck: 7 Jenny [10] Drake Passage, Southern Ocean Most likely a legend 1958 Aircraft: 7 Cape Hallett Bay plane crash [11] Cape Hallett Bay, Antarctica 6 survivors 1966 Aircraft: 6 Ross Ice Shelf plane crash [12] Ross Ice Shelf, Antarctica 1986 Aircraft: 6 Philippi Glacier plane crash [13] Philippi Glacier ...
Viral hemorrhagic septicemia (VHS) is a deadly infectious fish disease caused by Viral hemorrhagic septicemia virus. It afflicts over 50 species of freshwater and marine fish in several parts of the Northern Hemisphere. [1] Different strains of the virus occur in different regions, and affect different species.
Deaths probably numbered in the tens or perhaps over a hundred million, with perhaps 90% of the population dead in the worst-hit areas. Lack of scientific knowledge about microorganisms and lack of surviving medical records for many areas makes attribution of specific numbers to specific diseases uncertain.
Most marine viruses are bacteriophages, which are harmless to plants and animals, but are essential to the regulation of saltwater and freshwater ecosystems. [14] They infect and destroy bacteria in aquatic microbial communities, and are the most important mechanism of recycling carbon in the marine environment.
In October 2013, in a marine laboratory seawater tank in California holding various species of sea stars, other species started displaying similar symptoms. The ochre star (Pisaster ochraceus) was the first affected. Most of these developed symptoms, lost arms and died over the course of a week or so.
The name "marnaviridae" is based on its genome type (RNA virus - rnaviridae), together with the prefix "ma" being derived from the Latin word mare (sea).[10]The family was proposed following the discovery of an RNA virus (HaRNAV) that infects H. akashiwo off of the coast of British Columbia, which was the first report of a single-stranded RNA virus capable of causing cell lysis in phytoplankton.