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Trombicula Alfreddugesi
''Trombicula alfreddugesi'', also called ''Eutrombicula alfreddugesi'', is a species in the genus ''Trombicula''. (''Eutrombicula'' is a subgenus of mites in ''Trombicula'' of the family Trombiculidae.) It is the common chigger species of the United States, also sometimes called the harvest mite. Chiggers are the parasitic larval stages of these free-living mites. They are rarely seen in the dry Western states because the species prefers humid climates. '''' online, retrieved 10 August 2011: "occurs from the Atlantic coast to the Midwest and southward to Mexico". They are commonly found in undergrowth and grassy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutrombicula
''Eutrombicula'' is a genus of mites in the family Trombiculidae. The species of this genus are found throughout North America, and Australia. The genus was first described by Henry Ellsworth Ewing in 1938. Two genera of chigger mites, each containing many species, are of concern to U.S. deployed military forces. They are ''Eutrombicula'' and ''Leptotrombidium''. Chiggers in the genus ''Eutrombicula'', such as ''Eutrombicula alfreddugesi'', do not transmit any known pathogens to people, but they can cause irritating bites, dermatitis and severe itching when they feed on the unsuspecting host. They are widely distributed in the Western Hemisphere, and Europe. By comparison chiggers in the genus ''Leptotrombidium'' are the vectors of scrub typhus throughout Asia and portions of Australia. The bite of ''Leptotrombidium'' often does not itch, or at least not as intensely, as those of ''Eutrombicula''. Also, a black necrotic lesion known as an eschar develops where the chigger fed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthonie Cornelis Oudemans
Anthonie (Antoon) Cornelis Oudemans Jzn (November 12, 1858 – January 14, 1943) was a Dutch zoologist. Although he was a specialist in acarology, the study of the ticks and mites, he was often best known for his books on sea monsters and the dodo. Born in Batavia, Dutch East Indies, he was the son of the noted Dutch astronomer Jean Abraham Chrétien Oudemans and the grandson of the Dutch educator, poet and philologist Anthonie Cornelis Oudemans Sr., after whom he was named. He often used the patronymic "Jzn" (for ''Jeanzoon'') in his publications. A cousin was the entomologist J.T. Oudemans. He was educated at Arnhem and went to the University of Utrecht. He wrote his dissertation on ribbon worms, and in 1885 was appointed director of the Royal Zoological Gardens at The Hague. Oudemans worked on the acari and comprehensively reviewed all literature until 1850 in a series of articles titled ''Kritisch historisch Overzicht der Acarologie''. He described numerous species not only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trombicula
''Trombicula'', known as chiggers, red bugs, scrub-itch mites, or berry bugs, are small arachnids (eight-legged arthropods) in the Trombiculidae family. In their larval stage, they attach to various animals, including humans, and feed on skin, often causing itching and trombiculosis. These relatives of ticks are nearly microscopic, measuring 0.4 mm (0.01 in) and have a chrome-orange hue. A common species of harvest mite in North America is '' Trombicula alfreddugesi''. The larval mites feed on the skin cells, but not blood, of animals. The six-legged parasitic larva feeds on a large variety of creatures, including humans, rabbits, wallabies, toads, box turtles, quail, and even some insects. After crawling onto their hosts, they inject digestive enzymes into the skin that break down skin cells. They do not actually "bite", but instead form a hole in the skin called a stylostome, and chew up tiny parts of the inner skin, thus causing severe irritation and swelling. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chigger
''Trombicula'', known as chiggers, red bugs, scrub-itch mites, or berry bugs, are small arachnids (eight-legged arthropods) in the Trombiculidae family. In their larval stage, they attach to various animals, including humans, and feed on skin, often causing itching and trombiculosis. These relatives of ticks are nearly microscopic, measuring 0.4 mm (0.01 in) and have a chrome-orange hue. A common species of harvest mite in North America is ''Trombicula alfreddugesi''. The larval mites feed on the skin Cell (biology), cells, but not blood, of animals. The six-legged parasitic larva feeds on a large variety of creatures, including humans, rabbits, wallabies, toads, box turtles, quail, and even some insects. After crawling onto their Host (biology), hosts, they inject digestive enzymes into the skin that break down skin cells. They do not actually "bite", but instead form a hole in the skin called a stylostome, and chew up tiny parts of the inner skin, thus causing seve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvest Mite
Trombiculidae (); commonly referred to in North America as chiggers and in Britain as harvest mites, but also known as berry bugs, bush-mites, red bugs or scrub-itch mites, are a family of mites. Chiggers are often confused with jiggers – a type of flea. Several species of Trombiculidae in their larva stage bite their animal or human host and by embedding their mouthparts into the skin cause "intense irritation" or "a wheal, usually with severe itching and dermatitis". Trombiculidae live in forests and grasslands and are also found in the vegetation of low, damp areas such as woodlands, berry bushes, orchards, along lakes and streams, and even in drier places where vegetation is low, such as lawns, golf courses, and parks. They are most numerous in early summer when grass, weeds, and other vegetation are heaviest. In their larval stage, they attach to various animals, including humans, and feed on skin, often causing itching. These relatives of ticks are nearly microscopic, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encyclopædia Britannica
The (Latin for "British Encyclopædia") is a general knowledge English-language encyclopaedia. It is published by Encyclopædia Britannica, Inc.; the company has existed since the 18th century, although it has changed ownership various times through the centuries. The encyclopaedia is maintained by about 100 full-time editors and more than 4,000 contributors. The 2010 version of the 15th edition, which spans 32 volumes and 32,640 pages, was the last printed edition. Since 2016, it has been published exclusively as an online encyclopaedia. Printed for 244 years, the ''Britannica'' was the longest running in-print encyclopaedia in the English language. It was first published between 1768 and 1771 in the Scottish capital of Edinburgh, as three volumes. The encyclopaedia grew in size: the second edition was 10 volumes, and by its fourth edition (1801–1810) it had expanded to 20 volumes. Its rising stature as a scholarly work helped recruit eminent con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Welt (bruise)
A welt is a bloodshot stripe on the skin. They are haematoma, a special form of a bruise. Welts occur as a result of blunt force being applied to the body with elongated objects without sharp edges. Like other haematomas, welts change their colors as they heal, which usually takes 2 to 4 weeks. The colors include purplish black, reddish blue, brown or yellowish green. That makes it possible to determine their approximate age. A special form of welts - when the impact tool is not flat - are double welts. They occur after blows with stick-like, long objects, such as a cane for caning, a riding crop or a garden hose A garden hose, hosepipe, or simply hose is a flexible tube used to convey water. There are a number of common attachments available for the end of the hose, such as sprayers and sprinklers (which are used to concentrate water at one point or .... The energy of the striking tool hitting the skin forces the tissue fluid or tissue matrix to the outside of the instrumen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dermatitis
Dermatitis is inflammation of the skin, typically characterized by itchiness, redness and a rash. In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. The area of skin involved can vary from small to covering the entire body. Dermatitis is often called eczema, and the difference between those terms is not standardized. The exact cause of the condition is often unclear. Cases may involve a combination of allergy and poor venous return. The type of dermatitis is generally determined by the person's history and the location of the rash. For example, irritant dermatitis often occurs on the hands of those who frequently get them wet. Allergic contact dermatitis occurs upon exposure to an allergen, causing a hypersensitivity reaction in the skin. Prevention of atopic dermatitis is typically with essential fatty acids, and may be treated with moisturizers and steroid creams. The steroid creams should generally be of mid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trombiculidae
Trombiculidae (); commonly referred to in North America as chiggers and in Britain as harvest mites, but also known as berry bugs, bush-mites, red bugs or scrub-itch mites, are a family of mites. Chiggers are often confused with Tunga penetrans, jiggers – a type of flea. Several species of Trombiculidae in their larva stage bite their animal or human host and by embedding their mouthparts into the skin cause "intense irritation" or "a wheal response, wheal, usually with severe itching and dermatitis". Trombiculidae live in forests and grasslands and are also found in the vegetation of low, damp areas such as woodlands, berry bushes, orchards, along lakes and streams, and even in drier places where vegetation is low, such as lawns, golf courses, and parks. They are most numerous in early summer when grass, weeds, and other vegetation are heaviest. In their larval stage, they attach to various animals, including humans, and feed on skin, often causing itching. These relatives of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnids Of North America
Arachnida () is a class of joint-legged invertebrate animals (arthropods), in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. Almost all adult arachnids have eight legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Greek word (''aráchnē'', 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Almost all extant arachnids are terrestrial, living mainly on land. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, of which 47,000 are species of spiders. Morphology Almost all adult arachnids have eight legs, unlike adult insects ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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