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18 de jun. de 2024 · Coronaviruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae, order Nidovirales and realm Riboviria. They are enveloped viruses with a positive-sense single-stranded RNA genome and a nucleocapsid of helical symmetry.
18 de jun. de 2024 · Rotavirus is a genus of double-stranded RNA viruses in the family Reoviridae. There are nine species of the genus, referred to as A, B, C, D, F, G, H, I and J. Rotavirus A is the most common species, and these rotaviruses cause more than 90% of rotavirus infections in humans. [4] The virus is transmitted by the faecal–oral route.
Hace 2 días · Respiratory syncytial virus ( RSV ), [a] also called human respiratory syncytial virus ( hRSV) and human orthopneumovirus, is a contagious virus that causes infections of the respiratory tract. It is a negative-sense, single-stranded RNA virus. [2] Its name is derived from the large cells known as syncytia that form when infected cells fuse.
10 de jun. de 2024 · As a first step toward the formal classification of ‘ambiviruses,’ the International Committee on Taxonomy of Viruses (ICTV) recently approved the establishment of a novel ribovirian phylum, Ambiviricota, to accommodate an initial set of 20 members with well-annotated genome sequences.
In March 2021, following the annual International Committee on Taxonomy of Viruses (ICTV) ratification vote on newly proposed taxa, the phylum Negarnaviricota was amended and emended.
Hace 6 días · This page will be updated whenever a new taxonomy release has been approved by the ICTV. Unless the "Select to search across all ICTV releases" button is checked below, your search will be against the taxonomy release indicated below the search box (or below the search result set, if present).
Hace 1 día · 病毒 （ virus ）是僅能在 生物體 活細胞內複製繁衍的亞顯微 [註 1] 病原體 [1] 。 它由 核酸 分子（ DNA 或 RNA ）与保护性外壳（ 蛋白质 ）构成的非细胞形态的类生物结构（bio-like structure），無法自行表現出 生命現象 ，是介於生命体及非生命體之間的生化結構，既不是 生物 亦不是非生物，卻是寄生性 自我複製物 （self-replicator）。 藉由感染機制侵入有機體後，这些简单的生化結構可以利用 宿主 的 细胞 系统自我复制， [2] 但无法独立生长和复制。 病毒可以感染所有具有细胞结构的生命体。 第一个已知的病毒是 烟草花叶病毒 ，由 马丁乌斯·贝杰林克 于1899年发现并命名， [3] 迄今已有超过5000种类型的病毒得到鉴定。
