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Iotapapillomavirus
''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such as papillomas and keratoacanthomas. Taxonomy The following two species are assigned to the genus: * ''Iotapapillomavirus 1'' * ''Iotapapillomavirus 2 ''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such a ...'' Structure Viruses in ''Iotapapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by attachment of the viral proteins to host receptors, which mediates end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iotapapillomavirus 1
''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such as papillomas and keratoacanthomas. Taxonomy The following two species are assigned to the genus: * ''Iotapapillomavirus 1'' * ''Iotapapillomavirus 2 ''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such a ...'' Structure Viruses in ''Iotapapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by attachment of the viral proteins to host receptors, which mediates end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iotapapillomavirus 2
''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such as papillomas and keratoacanthomas. Taxonomy The following two species are assigned to the genus: * ''Iotapapillomavirus 1'' * ''Iotapapillomavirus 2 ''Iotapapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Rodents serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: cutaneous lesions and benign skin tumours, such a ...'' Structure Viruses in ''Iotapapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by attachment of the viral proteins to host receptors, which mediates end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papillomaviridae
''Papillomaviridae'' is a family of non- enveloped DNA viruses whose members are known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected mammals, but also other vertebrates such as birds, snakes, turtles and fish. Infection by most papillomavirus types, depending on the type, is either asymptomatic (e.g. most Beta-PVs) or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus 1, HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous. Papillomaviruses are usually considered as highly host- and tissue-tropic, and are thought to rarely be transmitted between species. Papillomaviruses replicate exclusively in the basal layer of the body surface tissues. All known papillomavirus types infect a particular body surface, typically the skin or mucosal epithelium of the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papillomavirus
''Papillomaviridae'' is a family of non- enveloped DNA viruses whose members are known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected mammals, but also other vertebrates such as birds, snakes, turtles and fish. Infection by most papillomavirus types, depending on the type, is either asymptomatic (e.g. most Beta-PVs) or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus 1, HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous. Papillomaviruses are usually considered as highly host- and tissue-tropic, and are thought to rarely be transmitted between species. Papillomaviruses replicate exclusively in the basal layer of the body surface tissues. All known papillomavirus types infect a particular body surface, typically the skin or mucosal epithelium of the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viruses
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898,Dimmock p. 4 more than 9,000 virus species have been described in detail of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology. When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or ''virions'', consisting of (i) the genetic material, i.e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papillomas
A papilloma (plural papillomas or papillomata) ('' papillo-'' + '' -oma'') is a benign epithelial tumor growing exophytically (outwardly projecting) in nipple-like and often finger-like fronds. In this context, papilla refers to the projection created by the tumor, not a tumor on an already existing papilla (such as the nipple). When used without context, it frequently refers to infections (squamous cell papilloma) caused by human papillomavirus (HPV), such as warts. Human papillomavirus infection is a major cause of cervical cancer, vulvar cancer, vaginal cancer, penis cancer, anal cancer, and HPV-positive oropharyngeal cancer, HPV-positive oropharyngeal cancers. Most Wart, viral warts are caused by human papillomavirus infection (HPV), of which there are nearly 200 distinct human papillomaviruses (HPVs), and many HPV types are Carcinogenic virus, carcinogenic. There are, however, a number of other conditions that cause papilloma, as well as many cases in which there is no known c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keratoacanthomas
Keratoacanthoma (KA) is a common low-grade (unlikely to metastasize or invade) rapidly-growing skin tumour that is believed to originate from the hair follicle (pilosebaceous unit) and can resemble squamous cell carcinoma. The defining characteristic of a keratoacanthoma is that it is dome-shaped, symmetrical, surrounded by a smooth wall of inflamed skin, and capped with keratin scales and debris. It grows rapidly, reaching a large size within days or weeks, and if untreated for months will almost always starve itself of nourishment, necrose (die), slough, and heal with scarring. Keratoacanthoma is commonly found on sun-exposed skin, often face, forearms and hands. It is rarely found at a mucocutaneous junction or on mucous membranes. Keratoacanthoma may be difficult to distinguish visually from a skin cancer. Under the microscope, keratoacanthoma very closely resembles squamous cell carcinoma. In order to differentiate between the two, almost the entire structure needs to be remov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
