brown recluse spider

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Related to Brown recluse: wolf spider, Hobo spider


1. an arthropod of the class Arachnida.
spider bite in the United States, the two spiders whose bites are most likely to cause a serious reaction are the black widow spider(Latrodectus mactans) and the brown recluse spider(Loxosceles reclusa). Signs and symptoms are associated with the effects of injection of the venom and include pain at the injection site, weakness, muscle pain and cramps, elevated blood pressure, and restlessness. Bites by these spiders must be treated promptly and effectively. First aid is the same as that for a snakebite and includes the following:

1. Wash the wound with soap and water and apply a clean dressing.

2. Apply a constricting band between the area of the bite and the heart.

3. Keep the person calm and transport him to the hospital or medical facility as soon as possible.

4. If swelling becomes apparent, apply a cold compress to the area.
black widow spider Latrodectus mactans, a poisonous spider found in North America; see spider bite.
brown recluse spider Loxosceles reclusa, a poisonous spider found in North America; see spider bite.
vascular spider a telangiectasis due to dilatation and branching of superficial cutaneous arteries, which presents as a bright red central portion with branching radiations, the whole somewhat resembling the configuration of a spider. The lesions may occur singly or in large numbers, and may be nevoid or acquired, being commonly associated with pregnancy and liver disease. Called also nevus araneus, spider nevus, and spider telangiectasia.

brown recluse spider

A venomous spider (Loxosceles reclusa) having a violin-shaped mark on the cephalothorax, native to the southern and central United States and found in dark undisturbed areas such as closets and sheds. Also called fiddleback spider.

brown recluse spider

a small poisonous arachnid, Loxosceles reclusa, also known as the brown or violin spider, found in both North and South America. The bite produces a characteristic necrotic lesion. The venom from its bite usually creates a blister surrounded by concentric white and red circles. This so-called bull's-eye appearance is helpful in distinguishing it from other spider bites. There is little or no initial pain, but localized pain develops in about an hour. The patient may experience systemic symptoms; nausea, fever, and chills are common, but the reaction is usually self-limited. Immediate treatment includes keeping the victim quiet and immobilizing the bite area at the level of the heart. A bleb forms, sometimes in a target or bull's-eye pattern. The blood-filled bleb increases in size and eventually ruptures, leaving a black scar. Antivenin is not available in the United States.
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Brown recluse spider
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Brown recluse spider bite after 48 hours

rec·luse spi·der

(rek'lūs spī'dĕr)
The (brown) recluse spider is a venomous representative, Loxosceles reclusa, of the family Sicariidae (formerly of the family Loxoscelidae); native to the United States from the southern Midwest south to the Gulf of Mexico, but found elsewhere too. Most bites are minor with no necrosis, but consequences may be worse in some cases.
Synonym(s): brown recluse spider.


an arthropod of the class Arachnida.

black widow spider
see latrodectus mactans.
brown recluse spider
a poisonous spider, Loxoceles reclusa, whose bite causes severe poisoning in humans.
spider lily
see crinum.
trapdoor spider
Atrax robustus. Called also funnel-web spider.
spider grass
spider lamb syndrome
inherited arachnomelia.
References in periodicals archive ?
According to WebMD, after a spider bite from a brown recluse the individual should apply ice to reduce the pain and swelling, take acetaminophen for pain relief, elevate the area above the heart if possible, wash it thoroughly with soap and water, and avoid any strenuous activity since that could spread the spider's venom.
Though all spiders are poisonous in a way, which helps them kill and digest their prey, the brown recluse spider is one of the few spiders that are dangerous to humans, said Logan Randolph, a biology professor from Polk State College.
One of few common spiders whose bites can have a seriously harmful effect on humans, the brown recluse has venom that contains a rare protein that can cause a blackened lesion at the site of a bite, or a much less common, but more dangerous, systemic reaction in humans.
The Brown Recluse is sometimes called the Violin Spider because of the distinct violin-shaped marking on its back.
The center's hyperbaric oxygen chamber can also be used to treat patients suffering from such uncommon ailments as cyanide poisoning, gangrene, carbon monoxide poisoning, brown recluse spider bites and the "bends," or decompression sickness.
Although brown recluse spider bites are not a widespread cause of anemia, the diagnosis should be considered in patients with unexplained anemia, according to a study from St.
Loxosceles reclusa (common name: Brown Recluse Spider) and related arachnids are indigenous American spiders that possess a venom capable of causing painful necrotic ulcers with surrounding inflammation and possibly severe systemic effects (1,2,3,4).
There are a number of relatives of the American black widow spider in various parts of the world, and about 50 species of recluse spiders, of which the American species is the brown recluse spider, or Loxosceles reclusa.
Differential diagnoses for cutaneous anthrax include brown recluse spider bites, ecthyma gangrenosum, tularemia, staph infections, and herpes labialis.
Loxosceles reclusa y loxoscelismo: The Brown Recluse Spider and Envenomation Reactions.
The brown recluse spider, Loxosceles reclusa (Gertsch & Mulaik 1940), is distributed throughout the south-central United States (Gertsch & Ennik 1983; Vetter 2005).