Insect bites and stings Health Article

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Illustrations
Insect stings and allergy
Allergic reaction to bee stings occurs when a person becomes sensitized to the venom from a previous sting. This reaction is different from the reaction to the poison in the bite of a black widow spider, which injects a potent toxin into the blood. Ordinarily, bee venom is not toxic and will only cause local pain and swelling. The allergic reaction comes when the immune system is oversensitized to the venom and produces antibodies to it. Histamines and other substances are released into the bloodstream, causing blood vessels to dilate and tissues to swell. Severe reactions can lead to anaphylactic shock, a life-threatening series of symptoms including swelling of the throat and difficulty breathing. Persons who develop an allergy to bee stings should carry prescription bee sting kits to counteract the reaction to bee venom. Update Date:
04/28/2008
David C. Dugdale, III., MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Stuart I. Henochowicz, MD, FACP, Associate Clinical Professor of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Bedbug - close-up

Black widow spider

Body louse

Flea

Fly

Kissing bug

Dust mite

Mosquito, adult feeding on the skin

Wasp

Flea bite - close-up

Insect bite reaction - close-up

Insect bites on the legs

Head louse, male

Head louse - female

Head louse infestation - scalp

Lice, body with stool (Pediculus humanus)

Body louse, female and larvae

Crab louse, female

Pubic louse-male

Head louse and pubic louse

Brown recluse spider bite on the hand

Insect bites and stings

Insect stings and allergy

Brown recluse spider

Black widow spider

Stinger removal

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