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Atoxoplasma
''Atoxoplasma'' is a genus of parasitic alveolates in the phylum Apicomplexa. The species in this genus infect birds. They are spread by the orofaecal route. History This genus was created by Garnham in 1950. The history of this genus has been plagued with confusion. Before 1909 the species in this genus were confused with those of the genus '' Haemoproteus''. Between 1909 and 1937 they were considered to be species of the genus '' Toxoplasma''. It was because of this historical confusion with ''Toxoplasma'' that Garnham chose the name ''Atoxoplasma'' for this genus. Garnham defined this genus to be those parasites that infect the monocytes of birds, are strictly host specific, have a granular cytoplasm and a large nucleus. His choice of type species ''Atoxoplasma avium'' was later shown to be a junior synonym of ''Atoxplasma paddae''. Lainson in 1958 published a study suggesting that these species were transmitted by ticks and that this genus was a synonym of ''Lankesterella'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atoxoplasma Anthropoidii
''Atoxoplasma'' is a genus of parasitic alveolates in the phylum Apicomplexa. The species in this genus infect birds. They are spread by the orofaecal route. History This genus was created by Garnham in 1950. The history of this genus has been plagued with confusion. Before 1909 the species in this genus were confused with those of the genus ''Haemoproteus''. Between 1909 and 1937 they were considered to be species of the genus ''Toxoplasma''. It was because of this historical confusion with ''Toxoplasma'' that Garnham chose the name ''Atoxoplasma'' for this genus. Garnham defined this genus to be those parasites that infect the monocytes of birds, are strictly host specific, have a granular cytoplasm and a large nucleus. His choice of type species ''Atoxoplasma avium'' was later shown to be a junior synonym of ''Atoxplasma paddae''. Lainson in 1958 published a study suggesting that these species were transmitted by ticks and that this genus was a synonym of ''Lankesterella'' - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lankesterella (protozoa)
''Lankesterella'' is a genus in the phylum Apicomplexa. Species in this genus infect amphibians, reptiles and birds. The type species is ''Lankesterella minima''. History This genus was created by Labbe in 1899. This genus is more commonly known as ''Atoxoplasma'', it is a genus of parasitic alveolates in the phylum Apicomplexa. Atoxoplasma species in passerines are a group of organisms with intestinal and extraintestinal forms that can cause significant morbidity and mortality but are not transmissible by syringe. These genera were united by Lainson in 1959. They were separated again by Levin in 1982. More commonly known as Atoxoplasma, it is a genus of parasitic alveolates in the phylum Apicomplexa. ''Apicomplexans'' are obligate intracellular parasites that typically invade blood cells. They have a distinct feature called the ''apical complex'' which helps in the penetration of the parasite into the host cell. Atoxoplasma sp. in passerines is a group of organisms wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isospora
''Isospora'' is a genus of internal parasites in the subclass Coccidia. It is responsible for the condition isosporiasis, which causes acute, non-bloody diarrhoea in immunocompromised individuals. Taxonomy At least 248 species were originally described in this genus. For instance, the house sparrow The house sparrow (''Passer domesticus'') is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of and a mass of . Females and young birds are coloured pale brown and grey, an ... has 12 species of ''Isospora''. However, most species are little studied, and some authors doubt whether all should be recognized as distinct species. In 2005, all former ''Isospora'' species that infect mammalian hosts were reclassified as members of the genus '' Cystoisospora'', a member of the Sarcocystidae family. References External links * Apicomplexa genera Conoidasida {{Apicomplexa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexa
The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic alveolates. Most of them possess a unique form of organelle that comprises a type of non-photosynthetic plastid called an apicoplast, and an apical complex structure. The organelle is an adaptation that the apicomplexan applies in penetration of a host cell. The Apicomplexa are unicellular and spore-forming. All species are obligate endoparasites of animals, except '' Nephromyces'', a symbiont in marine animals, originally classified as a chytrid fungus. Motile structures such as flagella or pseudopods are present only in certain gamete stages. The Apicomplexa are a diverse group that includes organisms such as the coccidia, gregarines, piroplasms, haemogregarines, and plasmodia. Diseases caused by Apicomplexa include: * Babesiosis ('' Babesia'') * Malaria (''Plasmodium'') * Cryptosporidiosis ('' Cryptosporidium parvum'') * Cyclosporiasis ('' Cyclospora cayetanensis'') * Cystoisosporiasis ('' Cys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passer Domesticus
The house sparrow (''Passer domesticus'') is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of and a mass of . Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. One of about 25 species in the genus '' Passer'', the house sparrow is native to most of Europe, the Mediterranean Basin, and a large part of Asia. Its intentional or accidental introductions to many regions, including parts of Australasia, Africa, and the Americas, make it the most widely distributed wild bird. The house sparrow is strongly associated with human habitation, and can live in urban or rural settings. Though found in widely varied habitats and climates, it typically avoids extensive woodlands, grasslands, and deserts away from human development. It feeds mostly on the seeds of grains and weeds, but it is an opportunistic eater and commonly eats insects and many ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serinus Canarius
The Atlantic canary (''Serinus canaria''), known worldwide simply as the wild canary and also called the island canary, common canary, or canary, is a small passerine bird belonging to the genus ''Serinus'' in the finch family, Fringillidae. It is native to the Canary Islands, the Azores, and Madeira. Wild birds are mostly yellow-green, with brownish streaking on the back. The species is common in captivity and a number of colour varieties have been bred. This bird is the natural symbol of the Canary Islands, together with the Canary Island date palm. Description The Atlantic canary can range from in length, with a wingspan of and a weight of , with an average of around .Snow, D. W. & Perrins, C. M. (1998). ''The Birds of the Western Palearctic'' concise ed. Oxford University Press. .''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), .''Finches and Sparrows'' by Peter Clement. Princeton University Press (1999). . The male has a largely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexa Lifecycle Stages
Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a ''cellular variety'' with a distinct morphology and biochemistry. Not all apicomplexa develop all the following cellular varieties and division methods. This presentation is intended as an outline of a hypothetical generalised apicomplexan organism. Methods of asexual replication Apicomplexans (sporozoans) replicate via ways of multiple fission (also known as schizogony). These ways include , and , although the latter is sometimes referred to as schizogony, despite its general meaning. Merogony is an asexually reproductive process of apicomplexa. After infecting a host cell, a trophozoite ( see glossary below) increases in size while repeatedly replicating its nucleus and other organelles. During this process, the orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stieda Body
The Stieda body is an organelle located at the polar region of the sporocyst of some coccidia visible with electron microscopy. It appears as a knob like structure and is a plug occluding a hole in the sporocyst. The breakdown of this body allows excystation of the sporozoites. References Apicomplexa {{Microbiology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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