The arenaviridae are a family of viruses whose members are generally associated with rodent transmitted diseases in humans each virus usually is associated with a particular rodent host species in which it is maintained arenavirus infections are relatively common in humans in some areas of the world and can cause severe illnesses. In virus taxonomy 2012 publisher summary this chapter focuses on arenaviridae family whose sole member genus is arenavirus the virions of this family are spherical to pleomorphic are of 50 300 nm in diameter with a dense lipid envelope and have a surface layer covered by club shaped projections of 8 10 nm in length. Arenavirus any virus belonging to the family arenaviridae the name of the family is derived from the latin arenosus meaning sandy which describes the grainy appearance of arenavirus ribosomes protein synthesizing particlesarenaviruses have spherical enveloped virions virus particles that are 110 130 nm 1 nm 10 9 metre in diameter. partial sequences phylogenetic relationships within the family arenaviridae nucleic acid sequences from the n genes of all the known arenaviruses have provided the basis for phylogenetic analysis that supports previously defined antigenic groupings and further defines virus relationships within them
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