In Spanish, it (and other South American recluse spiders) is known as araña de rincón, or "corner spider"; in Portuguese, as aranha-marrom or "brown spider". According to one study, the venom of the Chilean recluse along with the six-eyed sand spider Hexophthalma hahni, contains an order of magnitude more of this substance than that of other sicariid spiders such as the brown recluse. [19] Retrospective data are limited because they lack a definition of time to antivenom administration and its relation to outcome. Autor: Lennin Alcántara Valle. Pertence ao gênero Loxosceles, sendo a maior espécie desse grupo. No controlled trials have been reported; the practice is controversial, but clinical experience in Perú and several limited studies support this practice. El veneno que produce Loxosceles laeta pudiera ser mortal para el hombre, dependiendo de la relación entre la cantidad inoculada y masa del individuo. The spiders can last a long time without food or water,[3] a fact that encourages their worldwide spread. [citation needed] The spider is known to have established itself in the Los Angeles area. They are venomous spiders known for their bite, which sometimes produces a characteristic set of symptoms known as loxoscelism. [14] In a period from 1955 to 2000 250 cases of Loxoscelism were studied in Santiago, Chile, cutaneous loxoscelism occurred in 81.2% of the cases (203), while the most severe form, viscerocutaneous loxoscelism, occurred in 18.8% (47). Systemic corticosteroids are often considered, but without clinical trials to support the practice. The Chilean recluse spider is a highly venomous spider, Loxosceles laeta, of the family Sicariidae (formerly of the family Loxoscelidae). Of the 47 who had viscerocutaneous loxoscelism, 9 died, representing a mortality rate of 19.1%, 6 were women and 3 were men, aged 2 to 37 years, 6 occurred in the summer, two in the fall and one in the winter. The spider should be brought with the patient in a clear, tightly closed container for identification, if it can be captured. generally undisturbed. Es originaria de América del Sur, común en Chile, Perú, Ecuador, Argentina, Uruguay, Paraguay y Brasil. [12] In a single year (2005) no deaths were reported. Peruvian Loxosceles laeta venoms toxic effects. Ha sido introducida accidentalmente en diferentes países de América del Norte y América Central, así como también en Australia, Finlandia y España. Cutaneous loxoscelism results from serious bites causing a necrotising skin ulcer in about 50% of bites[11] with destruction of soft tissue and may take months, and rarely years to heal, leaving deep scars. h�bbd```b``Y "�Hfy�ko���e���.ɺ,� f��+��9�t ��dJ���`s$���l �f����2XH �A����g��_S���A�@}��H$%������ {O endstream endobj startxref 0 %%EOF 782 0 obj <>stream Coloring varies from light tan to brown and the violin marking may not be visible. In Spanish, it (and other South American recluse spiders) is known as araña de rincón, or "corner spider"; in Portuguese, as aranha-marrom or "brown spider". %PDF-1.7 %���� 2. Materials and methods 2.1. Su acción es necrótica y proteolítica, ya que disuelve los tejidos corporales, causando la muerte celular. 648 0 obj <> endobj 676 0 obj <>/Filter/FlateDecode/ID[<6054CC6611C6F8BF8D698DBB52D5C1E5>]/Index[648 135]/Info 647 0 R/Length 133/Prev 987133/Root 649 0 R/Size 783/Type/XRef/W[1 3 1]>>stream It is considered by many to be the most dangerous of recluse spiders, and its bites often result in serious systemic reactions, even death.[2]. Loxosceles laeta. Unlike most web weavers, they leave these webs at night to hunt. [18] Applying aloe vera may soothe and help control the pain. People get bitten when they unintentionally squeeze them in clothing and bedding. Like all sicariid spiders, the venom of the Chilean recluse contains the dermonecrotic agent Sphingomyelinase D, which is otherwise found only in a few pathogenic bacteria. It is common in Chile, and can be found in Perú, Ecuador, Argentina, Uruguay, and south and eastern Brazil.[4][5]. These are composed of multilayers of coarse silk, the amount of which reflects the degree of spider activity and duration of the infestation. The spider is frequently found in human dwellings. The recluse spiders (Loxosceles (/ l ɒ k ˈ s ɒ s ɪ l iː z /), also known as brown spiders, fiddle-backs, violin spiders, and reapers, is a genus of spiders that was first described by R. T. Lowe in 1832.

loxosceles laeta características

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