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Psittacine Beak And Feather Disease
Psittacine beak and feather disease (PBFD) is a viral disease affecting all Old World and New World parrots. The causative virus—''beak and feather disease virus'' (BFDV)—belongs to the taxonomic genus ''Circovirus'', family ''Circoviridae''. It attacks the feather follicles and the beak and claw matrices of the bird, causing progressive feather, claw and beak malformation and necrosis. In later stages of the disease, feather shaft constriction occurs, hampering development until eventually all feather growth stops. It occurs in an acutely fatal form and a chronic form. Cracking and peeling of the outer layers of the claws and beak make tissues vulnerable to secondary infection. Because the virus also affects the thymus and Bursa of Fabricius, slowing lymphocyte production, immunosuppression occurs and the bird becomes more vulnerable to secondary infections. Beak fractures and necrosis of the hard palate can prevent the bird from eating.Pyne, MPsittacine Beak and Fea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-rumped Parrot
The red-rumped parrot (''Psephotus haematonotus''), also known as the red-backed parrot or grass parrot, is a common bird of south-eastern Australia, particularly in the Murray-Darling Basin. Taxonomy The red-rumped parrot was described by John Gould in 1838 as ''Platycercus haematonotus'' from a specimen collected in New South Wales. He felt it was intermediate between the genera '' Platycercus'' and ''Nanodes'', placing it in the former. He gave it its species name on account of its red rump. ould's species description appears in the meeting notes without a title./ref> It is the type species for the genus ''Psephotus''. It was long presumed to be closely related to the mulga parrot, however analysis of multiple genetic material shows it to be an early offshoot of a group containing the genera '' Platycercus'' and '' Barnardius''. Hence all other species in the genus have been moved to the new genus ''Psephotellus'', leaving the red-rumped parrot as the sole member in the no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanoviridae
''Nanoviridae'' is a family of viruses. Plants serve as natural hosts. There are currently 12 species in this family, divided among 2 genera and one unassigned species. Diseases associated with this family include: stunting. Their name is derived from the Greek word νᾶνος (''nanos''; dwarf), because of their small genome and their stunting effect on infected plants. Taxonomy The recognized genera are: * '' Babuvirus'' * ''Nanovirus'' The unassigned species is '' Coconut foliar decay virus''. Virus structure and genome Viruses in the family ''Nanoviridae'' are non-enveloped, with icosahedral and round geometries, and T=1 symmetry. The diameter is around 18-19 nm. The genome is composed of a multiple segments of single stranded circular DNA each ~1 kilobase in length (about 81 kb in total length). There between 6 and 11 circular segments depending on the genus. The segments each encode a single protein. There is a putative stem loop structure in the non-coding regi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faba Bean Necrotic Yellows Virus
Faba bean necrotic yellows virus (FBNYV) is a Nanovirus disease of legumes. Range Algeria, Egypt, Eritrea, Ethiopia, Libya, Morocco, Sudan, Tunisia, Azerbaijan, Iran, Iraq, Jordan, Lebanon, Pakistan, Syria, Turkey, Yemen, Spain and Balearic Islands. Genome FBNYV is one of the circular Rep-encoding ssDNA viruses, and so shares the characteristics of circular genome, replication initiation by Rep proteins, ssDNA composition. Replication is presumed to occur through the rolling circle replication (RCR) process. Vega-Rocha et al. 2007 disclose the structure of the FBNYV Rep's HUH-tag, HUH endonuclease domain. Virulence factors FBNYV produces the small protein which binds to SKP1 (plant), SKP1 and Prb protein, Prb proteins in plants. Timchenko et al. 2006 demonstrate that Clink is not necessary to produce symptoms in ''Vicia faba'' in laboratory conditions. However they do find it to be highly conservation (genetics), conserved, 98% of successfully infected plants testing posi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subterranean Clover Stunt Virus
Subterranean(s) or The Subterranean(s) may refer to: * Subterranea (geography), underground structures, both natural and man-made Literature * Subterranean (novel), ''Subterranean'' (novel), a 1998 novel by James Rollins * ''Subterranean Magazine'', an American fantasy, horror and science fiction magazine * Subterranean Press, an American small press publisher * ''The Subterraneans'', a 1958 novella by Jack Kerouac Media (film and TV) * The Subterraneans (film), ''The Subterraneans'' (film) 1960 motion picture based on the Kerouac novella * ''The Subterranean'', a 1967 Romanian film * ''Subterranean'' (TV program), an American music show which ran from 2003 to 2011 Music * Subterranean (EP), ''Subterranean'' (EP) (1995), an EP by In Flames * "Subterranean" (2003), a song by Smack (American band), Smack * "Subterranean" (2014), a song by Foo Fighters on the album Sonic Highways * Subterranean Records, an American record label * "Subterraneans" (1977), a song by David Bowie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porcine Circovirus
Porcine circovirus (PCV) is a group of four single-stranded DNA viruses that are non-enveloped with an unsegmented circular genome. They are members of the genus ''Circovirus'' that can infect pigs. The viral capsid is icosahedral and approximately 17 nm in diameter. PCVs are the smallest viruses replicating autonomously in eukaryotic cells. They replicate in the nucleus of infected cells, using the host polymerase for genome amplification. PCV-2 causes Porcine circovirus associated disease or postweaning multisystemic wasting syndrome (PMWS). An effective vaccination is now available. Fort Dodge Animal Health (Wyeth) launched the first USDA approved vaccine in 2006, containing an inactivated virus (ATCvet code: ). Classification Three strains of PCV are known as of 2018: * PCV-1 (first identified in 1974) readily infects, but is not known to cause disease in swine. * PCV-2 (first isolated in 1997) causes PMWS, which over time results in significant depletion of lympho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virus
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 ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233. South Australia shares borders with all of the other mainland states, as well as the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria (Australia), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-rumped Parrot
The red-rumped parrot (''Psephotus haematonotus''), also known as the red-backed parrot or grass parrot, is a common bird of south-eastern Australia, particularly in the Murray-Darling Basin. Taxonomy The red-rumped parrot was described by John Gould in 1838 as ''Platycercus haematonotus'' from a specimen collected in New South Wales. He felt it was intermediate between the genera '' Platycercus'' and ''Nanodes'', placing it in the former. He gave it its species name on account of its red rump. ould's species description appears in the meeting notes without a title./ref> It is the type species for the genus ''Psephotus''. It was long presumed to be closely related to the mulga parrot, however analysis of multiple genetic material shows it to be an early offshoot of a group containing the genera '' Platycercus'' and '' Barnardius''. Hence all other species in the genus have been moved to the new genus ''Psephotellus'', leaving the red-rumped parrot as the sole member in the no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edwin Ashby
Edwin Ashby (2 November 1861 – 8 January 1941) was an Adelaide based Australian property developer and a noted malacologist interested in chitonsWinckworth R. (1942). "Obituary. Edwin Ashby, 1861-1941". '' Proceedings of the Malacological Society of London'' 25(1): 2-4PDF and ornithologist. He was a founding member of the South Australian Ornithological Association (SAOA) in 1899, and of the Royal Australasian Ornithologists Union (RAOU) in 1901 for which he served as president 1926. The avian genus ''Ashbyia'' (represented by the gibberbird ''Ashbyia lovensis'') was named for him by Gregory Mathews. Ashby owned a farm, which he called 'Wittunga', in the Adelaide Hills. In 1901, he began a formal English garden beside the main house, which was later developed botanically by his son, Arthur Keith Ashby; his son donated to garden to the State of South Australia in 1965, and it was opened to the public in 1975 as Wittunga Botanic Garden. In 1911, Ashby expanded the Wittunga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galah
The galah (; ''Eolophus roseicapilla''), also known as the pink and grey cockatoo or rose-breasted cockatoo, is the only species within genus ''Eolophus'' of the cockatoo family. Found throughout Australia, it is among the most common of the cockatoos. With its distinctive pink and grey plumage and its bold and loud behaviour, it is a familiar sight in the wild and increasingly in urban areas. It has benefited from the change in the landscape since European colonisation, and appears to be replacing the Major Mitchell's cockatoo in parts of its range. Etymology The term galah is derived from ''gilaa'', a word from the Yuwaalaraay and neighbouring Aboriginal languages spoken in north-western New South Wales. Description The galah is about in length, and weighs . It has a pale silver to grey back, a pale grey rump, a pink face and breast, and a light pink mobile crest. It has a bone-coloured beak, and the bare skin of the eye ring is carunculated. It has grey legs. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
