SCIENCE|natural and applied sciences|life sciences · SOCIAL QUESTIONS|health|medical science|epidemiology|disease vector
- víreas Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- Virus
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- Definition die kleinsten existierenden Krankheitserreger mit einem Durchmesser von 15-300 nm, die also normale Bakterienfilter passieren Reference Reallex Med
- virus
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- Definition small biological entity, not visible with naked eye, characterised by the lack of independent metabolism Reference "COM-Terminology Coordination, based on: Wessner, D. R. (2010) The Origins of Viruses. Nature Education 3(9):37, http://www.nature.com/scitable/topicpage/the-origins-of-viruses-14398218 [28.3.2014]"
- Comment "There is much controversy as to whether viruses are living organisms or not, revived especially after the discovery of giant viruses. 1 1 giant virus [ IATE:3556252 ] See also: microorganism (related) [ IATE:1203151 ]"
- virus
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- Definition agent de très petite taille, qui ne peut vivre que dans les cellules vivantes qu'il parasite et qui ne peut se reproduire qu'à partir de son propre matériel génétique; depuis 1962,la classification des virus repose sur trois critères: a) type d'acide nucléique viral, ARN ou ADN, puisqu'un virus ne comporte qu'un type d'acide nucléique; b) morphologie de la capside protéique qui entoure l'acide nucléique et donne au virus son aspect hélicoïdal, icosaédrique ou mixte; c) la présence ou non d'une enveloppe venant entourer la capside, raison pour laquelle on parle, selon le cas, de virus enveloppé ou de virus non enveloppé; par exemple, le virus de l'hépatite B est un virus à ADN, c'est-à-dire un virus dont le matériel génétique est porté par une molécule d'ADN Reference GLTM
- virus
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- Comment 1. A virus is a physical entity made up of a chain of nucleic acids (DNA or RNA) which lives in a host cell, uses parts of the cellular machinery to reproduce, and releases the replicated nucleic acid chains to infect more cells.2. The taxonomic classification of viruses does not correspond to that of organisms with an independent metabolism, e.g. plants, animals, fungi. For example, there is no one kingdom that covers all viruses. Even the higher ranks that exist for viruses, 'realm' or 'subrealm', are not umbrella terms that cover all lower ranks: the only accepted realm, Riboviria, only covers some viruses. Generally, genetic relationships at higher taxonomic ranks for viruses are so unclear that only some can be grouped as a realm; many just don't get grouped at that higher level.3. Note that a virus is a disease vector; the disease itself is more clearly referred to as a 'viral disease' or 'viral infection'.