spider bite

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

spider bite

Punctures of the skin and/or envenomation by the fangs of a spider.
See: black widow spider; brown recluse spider
See also: bite
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Spider bites. In Auerbach PS, ed.: Wilderness medicine, 6th ed.
The effect of spider bites on humans is known for only a very few spider species in South Africa (SA), relative to the large number of species that occur in southern Africa and that very seldom come into contact with humans.
Patients with suspected spider bites bring in the culpable spider in only a minority of cases.
Findlay Russell (southern California physician, medical toxicologist, and one of the world's foremost authorities on animal venoms and plant toxins) attempted to alert the medical community to the errors of their ways in regard to jumping so vigorously on the brown recluse spider bite bandwagon (Anderson 1982; Russell & Gertsch 1983; Russell 1986).
aureus groups in terms of history of spider bite (7% vs.
The burn of hot peppers and the searing pain of a spider bite may have a common cause.
If spiders give you the creeps, you're certainly not alone--most humans instinctively associate spiders with spider bites. (Go ahead and admit it: The last time you found an unexplained and itchy red spot, you thought it might be a spider bite.) But if spiders were out to get you, you'd be gotten by now.
If a patient presents with an abscessed skin infection and tells you it's a spider bite, get a culture, he advised.
The diagnosis of a brown recluse spider bite is made clinically on the basis of a constellation of signs, symptoms, and history suggestive of exposure to the spider.
"There are always people who come in and think it's a spider bite and it turns out to be something else," said Dawn Fisher, nurse manager of Sacred Heart's emergency room.
Watch closely: After Maguire's character, nerdy Peter Parker, gains fantastic abilities from a radioactive spider bite, he sits down to sketch out the outfit he'll wear as Spider-Man.