|
Plasmodium Pessoai
''Plasmodium pessoai'' is a parasite of the genus ''Plasmodium''. As in all ''Plasmodium'' species, ''P. pessoai'' has both vertebrate and insect hosts. The vertebrate hosts for this parasite are reptiles. Taxonomy The parasite was first described by Ayala ''et al.'' in 1978.Ayala S.C., Moreno-Robles E., Bolaños-Herrera, R. (1978) ''Plasmodium pessoai'' sp. n. procedentes de dos serpientes costarricenses. J. Parasitol. 64(2)330-335 The species is named after Dr Samuel B Pessoa - a parasitologist at the Instituto Butantan, São Paulo, Brazil. Morphologically this species appears to be related to '' Plasmodium aurulentum''. Description The gametocytes are small and sausage shaped (10.4 x 4.6 micrometres) Immature schizonts often contain a digestive vacuole. Mature schizonts are spherical or bouquet-shaped and produce 22 - 32 merozoites. They may possess an intensely staining magenta or rose-coloured substance in the matrix of the surrounding vacuole. Distribution This s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasmodium
''Plasmodium'' is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of ''Plasmodium'' species involve development in a blood-feeding insect host which then injects parasites into a vertebrate host during a blood meal. Parasites grow within a vertebrate body tissue (often the liver) before entering the bloodstream to infect red blood cells. The ensuing destruction of host red blood cells can result in malaria. During this infection, some parasites are picked up by a blood-feeding insect (mosquitoes in majority cases), continuing the life cycle. ''Plasmodium'' is a member of the phylum Apicomplexa, a large group of parasitic eukaryotes. Within Apicomplexa, ''Plasmodium'' is in the order Haemosporida and family Plasmodiidae. Over 200 species of ''Plasmodium'' have been described, many of which have been subdivided into 14 subgenera based on parasite morphology and host range. Evolutionary relationships among different ''Pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micrometre
The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (). The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, and for grading wool by the diameter of the fibres. The width of a single human hair ranges from approximately 20 to . The longest human chromosome, chromosome 1, is approximately in length. Examples Between 1 μm and 10 μm: * 1–10 μm – length of a typical bacterium * 3–8 μm – width of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spilotes Pullatus
''Spilotes pullatus'', commonly known as the caninana, tiger rat snake, chicken snake, yellow rat snake, or ''serpiente tigre'', is a species of large nonvenomous colubrid snake endemic to warmer parts of the Americas. Geographic range It is found in southern Mexico, Central America, northern and central South America, and Trinidad and Tobago. Description Adults may attain a maximum total length of . Dorsally, ''S. pullatus'' is black with yellow spots which may form crossbands. The tip of the snout is yellow. The head shields may be mostly yellow, or mostly black, or crossbanded with a combination of yellow and black, but the sutures between the shields are always black. Ventrally, it is yellow with irregular black crossbands. The body is relatively slender and somewhat laterally compressed. The head is distinct from the neck. The eye is moderate in size with a round pupil. There are no suboculars, and the loreal is either very small or absent. There are 6 or 7 upper labials, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasmodium Tomodoni
''Plasmodium tomodoni'' is a parasite of the genus ''Plasmodium''. As in all ''Plasmodium'' species, ''P. tomodoni'' has both vertebrate and insect hosts. The vertebrate hosts for this parasite are reptiles. Taxonomy The parasite was first described by Pessoa and Fleury in 1968.Pessoa S.B. and Fleury G.C. (1968) ''Plasmodium tomodoni'' sp. n. parasita da serpente ''Tomodon dorsatus'' D & B. Rev. Brasil Biol. 28: 525-530 Distribution This species is found in Brazil. Hosts This species infects snakes. The other two species infecting snakes are ''Plasmodium pessoai'' and ''Plasmodium wenyoni ''Plasmodium wenyoni'' is a parasite of the genus ''Plasmodium''. As in all ''Plasmodium'' species, ''P. wenyoni'' has both vertebrate and insect hosts. The vertebrate hosts for this parasite are reptiles. Taxonomy The parasite was first descr ...''. The original host this species was described from was a '' Tomodon dorsatus'' from Brazil. References tomodoni {{plas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasmodium Wenyoni
''Plasmodium wenyoni'' is a parasite of the genus ''Plasmodium''. As in all ''Plasmodium'' species, ''P. wenyoni'' has both vertebrate and insect hosts. The vertebrate hosts for this parasite are reptiles. Taxonomy The parasite was first described by Garnham in 1965.Garnham P.C. (1965) ''Plasmodium wenyoni'' sp. nov., a malaria parasite of a Brazilian snake. Trans R Soc Trop Med Hyg. 59:277-279 The original host was a '' Thamnodynastes pallidus'' that died in a London zoo in 1934. Distribution This species is found in Brazil. Hosts The only known hosts of this species are snakes. The insect vectors for this species are mosquitoes of the genus ''Culex ''Culex'' is a genus of mosquitoes, several species of which serve as vectors of one or more important diseases of birds, humans, and other animals. The diseases they vector include arbovirus infections such as West Nile virus, Japanese encep ...''. Fever in the infected snake is irregular. References wenyo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merozoite
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 org ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuole
A vacuole () is a membrane-bound organelle which is present in plant and fungal cells and some protist, animal, and bacterial cells. Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution, though in certain cases they may contain solids which have been engulfed. Vacuoles are formed by the fusion of multiple membrane vesicles and are effectively just larger forms of these. The organelle has no basic shape or size; its structure varies according to the requirements of the cell. Discovery Contractile vacuoles ("stars") were first observed by Spallanzani (1776) in protozoa, although mistaken for respiratory organs. Dujardin (1841) named these "stars" as ''vacuoles''. In 1842, Schleiden applied the term for plant cells, to distinguish the structure with cell sap from the rest of the protoplasm. In 1885, de Vries named the vacuole membrane as tonoplast. Function The function and signifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schizont
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] |
Sausage
A sausage is a type of meat product usually made from ground meat—often pork, beef, or poultry—along with salt, spices and other flavourings. Other ingredients, such as grains or breadcrumbs may be included as fillers or extenders. When used as an adjective, the word ''sausage'' can refer to the loose sausage meat, which can be formed into patties or stuffed into a skin. When referred to as "a sausage", the product is usually cylindrical and encased in a skin. Typically, a sausage is formed in a casing traditionally made from intestine, but sometimes from synthetic materials. Sausages that are sold raw are cooked in many ways, including pan-frying, broiling and barbecuing. Some sausages are cooked during processing, and the casing may then be removed. Sausage-making is a traditional food preservation technique. Sausages may be preserved by curing, drying (often in association with fermentation or culturing, which can contribute to preservation), smoking, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertebrate
Vertebrates () comprise all animal taxa within the subphylum Vertebrata () ( chordates with backbones), including all mammals, birds, reptiles, amphibians, and fish. Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,963 species described. Vertebrates comprise such groups as the following: * jawless fish, which include hagfish and lampreys * jawed vertebrates, which include: ** cartilaginous fish (sharks, rays, and ratfish) ** bony vertebrates, which include: *** ray-fins (the majority of living bony fish) *** lobe-fins, which include: **** coelacanths and lungfish **** tetrapods (limbed vertebrates) Extant vertebrates range in size from the frog species ''Paedophryne amauensis'', at as little as , to the blue whale, at up to . Vertebrates make up less than five percent of all described animal species; the rest are invertebrates, which lack vertebral columns. The vertebrates traditionally include the hagfish, which do no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gametocyte
A gametocyte is a eukaryotic germ cell that divides by mitosis into other gametocytes or by meiosis into gametids during gametogenesis. Male gametocytes are called ''spermatocytes'', and female gametocytes are called ''oocytes''. Development The development of gametogonia to primary gametocytes is called gametocytogenesis. The further development of primary gametocytes to secondary gametocytes is a part of gametidogenesis. Gametogenesis is the formation or production of gametes (taking place during meiosis). The development and maturation of sex cells also takes place during meiosis. Gametogenesis is also the process of formation in male and female gametes that occur in the gonads (ovary and testis). Both male and female produce gametes. Male gametocytes are called spermatocytes and female gametocytes are called oocytes. The term gametocyte is also used, for example, when talking about gametocytes of species like ''Plasmodium falciparum'' or ''Plasmodium vivax'', which transmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasmodium Aurulentum
''Plasmodium anasum'' is a species of the genus '' Plasmodium''. Like all species in this genus it has both vertebrate and insect hosts. The vertebrate host are reptiles. Description This species was described by Telford in 1971.Telford SR Jr. (1971) A malaria parasite, ''Plasmodium aurulentum'' sp. nov. from the neotropical forest gecko ''Thecadactylus rapicaudus''. J. Protozool. 18(2):308 - 311 The schizonts give rise to 8 to 30 merozoites. The gametocytes are round to oval. Geographical location This species is found in Venezuela and Panama. Clinical features and pathological effects The only known host is the gecko Geckos are small, mostly carnivorous lizards that have a wide distribution, found on every continent except Antarctica. Belonging to the infraorder Gekkota, geckos are found in warm climates throughout the world. They range from . Geckos ar ... '' Thecadactylus rapicaudus''. References aurulentum {{plasmodium-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Gametocyte")