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Gnathostoma
''Gnathostoma'' is a genus of parasitic nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (h ...s. The species '' Gnathostoma spinigerum'' and '' Gnathostoma hispidum'' can cause gnathostomiasis. Neurognathostomiasis occurs in the USA. ''Gnathostoma binucleatum'' (which is native to the Americas) has not been previously reported to cause neurognathostomiasis, suggesting that ''G. spinigerum'' has been introduced to the Americas, but a survey of isolates has not confirmed this. Species * '' Gnathostoma binucleatum'' (Almeyda-. Artigas, 1991) * '' Gnathostoma doloresi'' * '' Gnathostoma hispidum'' (Fedtschenko, 1872) * '' Gnathostoma lamothei'' * '' Gnathostoma malaysiae'' (Miyazaki & Dunn, 1965) * '' Gnathostoma nipponicum'' * '' Gnathostoma spinigerum'' Levinsen, 1889 * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gnathostomata
Gnathostomata (; from Ancient Greek: (') 'jaw' + (') 'mouth') are jawed vertebrates. Gnathostome diversity comprises roughly 60,000 species, which accounts for 99% of all extant vertebrates, including all living bony fishes (both ray-finned and lobe-finned, including their terrestrial tetrapod relatives) and cartilaginous fishes, as well as extinct prehistoric fish such as placoderms and acanthodians. Most gnathostomes have retained ancestral traits like true teeth, a stomach, and paired appendages ( pectoral and pelvic fins, limbs, wings, etc.). Other traits are elastin, horizontal semicircular canal of the inner ear, myelinated neurons, and an adaptive immune system which has discrete secondary lymphoid organs (spleen and thymus) and uses V(D)J recombination to create antigen recognition sites, rather than using genetic recombination in the variable lymphocyte receptor gene. It is now assumed that Gnathostomata evolved from ancestors that already possessed two pairs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Richard Owen
Sir Richard Owen (20 July 1804 – 18 December 1892) was an English biologist, comparative anatomy, comparative anatomist and paleontology, palaeontologist. Owen is generally considered to have been an outstanding naturalist with a remarkable gift for interpreting fossils. Owen produced a vast array of scientific work, but is probably best remembered today for coining the word ''Dinosauria'' (meaning "Terrible Reptile" or "Fearfully Great Reptile"). An outspoken critic of Charles Darwin's theory of evolution by natural selection, Owen agreed with Darwin that evolution occurred but thought it was more complex than outlined in Darwin's ''On the Origin of Species''.[''Wikipedia:Citing sources, page range too broad''] Owen's approach to evolution can be considered to have anticipated the issues that have gained greater attention with the recent emergence of evolutionary developmental biology. Owen was the first president of the Microscopical Society of London in 1839 and edited ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Proceedings Of The Zoological Society Of London
The ''Journal of Zoology'' is a scientific journal concerning zoology, the study of animals. It was founded in 1830 by the Zoological Society of London and is published by Wiley-Blackwell. It carries original research papers, which are targeted towards general readers. Some of the articles are available via open access, depending on the author's wishes. According to the ''Journal Citation Reports'', the journal has a 2020 impact factor of 2.322, ranking it 36th out of 175 journals in the category "Zoology". From around 1833, it was known as the ''Proceedings of the Zoological Society of London'' (). From 1965 to 1984, it was known as the ''Journal of Zoology: Proceedings of the Zoological Society of London'' (). See also * List of zoology journals This is a list of scientific journals which cover the field of zoology. A * '' Acta Entomologica Musei Nationalis Pragae'' * '' Acta Zoologica Academiae Scientiarum Hungaricae'' * '' Acta Zoologica Bulgarica'' * '' Acta Zoológica M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Nematode
The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (helminths) are the cause of soil-transmitted helminthiases. They are classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa. Unlike the flatworms, nematodes have a tubular digestive system, with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. Estimates of the total number of extant species are su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gnathostoma Spinigerum
''Gnathostoma'' is a genus of parasitic nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (h ...s. The species '' Gnathostoma spinigerum'' and '' Gnathostoma hispidum'' can cause gnathostomiasis. Neurognathostomiasis occurs in the USA. ''Gnathostoma binucleatum'' (which is native to the Americas) has not been previously reported to cause neurognathostomiasis, suggesting that ''G. spinigerum'' has been introduced to the Americas, but a survey of isolates has not confirmed this. Species * '' Gnathostoma binucleatum'' (Almeyda-. Artigas, 1991) * '' Gnathostoma doloresi'' * '' Gnathostoma hispidum'' (Fedtschenko, 1872) * '' Gnathostoma lamothei'' * '' Gnathostoma malaysiae'' (Miyazaki & Dunn, 1965) * '' Gnathostoma nipponicum'' * '' Gnathostoma spinigerum'' Levinsen, 1889 * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gnathostoma Hispidum
''Gnathostoma hispidum'' is a nematode (roundworm) that infects many vertebrate animals including humans. Infection of ''Gnathostoma hispidum'', like many species of ''Gnathostoma'' causes the disease gnathostomiasis due to the migration of immature worms in the tissues."Gnathostomiasis" 2009. Parasites and Health. ''DPDx''. 20 July 2009. http://www.dpd.cdc.gov/dpdx/html/Gnathostomiasis.htm Life cycle In the natural definitive host (pigs, cats, dogs, wild animals), the adult worms reside in a tumor which they induce in the gastric wall. They deposit eggs that are unembryonated when passed in the feces. Eggs become embryonated in water, and eggs release first-stage larvae. If ingested by a small crustacean (''Cyclops'', first intermediate host), the first-stage larvae develop into second-stage larvae. Following ingestion of the ''Cyclops'' by a fish, frog, or snake (second intermediate host), the second-stage larvae migrate into the flesh and develop into third-stage larvae. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gnathostomiasis
Gnathostomiasis, also known as larva migrans profundus, is the human infection caused by the nematode '' Gnathostoma spinigerum'' and/or '' Gnathostoma hispidum'', which infects vertebrates. Signs and symptoms A few days after ingestion epigastric pain, fever, vomiting, and loss of appetite resulting from the migration of larvae through the intestinal wall to the abdominal cavity will appear in the patient. Migration of parasites in the subcutaneous tissues causing intermittent, migratory, painful, pruritic swellings is known as ''cutaneous larva migrans''. Patches of edema appear after initial symptoms clear and are usually found on the abdomen. These lesions vary in size and can be accompanied by pruritus, rash, and stabbing pain. Swellings may last 1 to 4 weeks in a given area and reappear in a different location. Migration to other tissues causes ''visceral larva migrans'' and can result in cough, hematuria, ocular involvement, meningitis, encephalitis and eosinophilia. Eosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gnathostoma Binucleatum
''Gnathostoma'' is a genus of parasitic nematodes. The species ''Gnathostoma spinigerum'' and ''Gnathostoma hispidum'' can cause gnathostomiasis. Neurognathostomiasis occurs in the USA. ''Gnathostoma binucleatum'' (which is native to the Americas) has not been previously reported to cause neurognathostomiasis, suggesting that ''G. spinigerum'' has been introduced to the Americas, but a survey of isolates has not confirmed this. Species * '' Gnathostoma binucleatum'' (Almeyda-. Artigas, 1991) * '' Gnathostoma doloresi'' * ''Gnathostoma hispidum'' (Fedtschenko, 1872) * '' Gnathostoma lamothei'' * '' Gnathostoma malaysiae'' (Miyazaki & Dunn, 1965) * '' Gnathostoma nipponicum'' * ''Gnathostoma spinigerum ''Gnathostoma'' is a genus of parasitic nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microor ...'' Levinsen, 1889 * '' Gnath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
