peanut allergy


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peanut allergy

Immunology A common cause of anaphylactic reactions which, unlike some allergies, is rarely outgrown; PA is the most common cause of food allergy in the US, and a leading cause of food-induced anaphylaxis and death after accidental exposure

peanut allergy

An IgE-mediated immediate hypersensitivity reaction to the consumption of peanuts (the seeds of Arachis hypogaea). Peanut allergens are designated Ara by the World Health Organization. Peanut allergy is the most important food allergy in the U.S., affecting more than a million people. Reactions range from mild (rashes) to life-threatening (closure of the airway, cardiac dysrhythmias, coma). About 50 people die of peanut allergy in the U.S. each year.

Patient care

People with known allergies to peanuts must avoid eating raw or processed peanuts and also products containing or prepared with peanut oil . Those affected by peanut allergy should learn to watch for the signs of anaphylaxis (hives, pruritus, rashes in the skin creases, shortness of breath, choking, wheezing, stridor). People with known anaphylaxis to peanuts should carry epinephrine injectors and use them at the onset of a hypersensitivity reaction. (Repeated use may be necessary in persistent reactions.) Cross-reactivity to other legumes (peas, soy products) may affect some people and pose important health risks. Affected people should wear medical alert bracelets or necklaces identifying their condition. Densensitization can be accomplished with modified peanut allergens.

See also: allergy

peanut allergy

An often severe form of ALLERGY in which up to one-third of sufferers experience ANAPHYLAXIS. Peanut allergy is not more common than other food allergies, all of which are rare, affecting about 1 person in 100,000 per year. It is becoming commoner, however, and is liable to be more severe than most, and is especially dangerous in asthmatic children. Peanut proteins may be found in such diverse foodstuffs as chocolate spread and scotch eggs. The allergy has been shown to be significantly associated with intake of soy milk or soy formula and with the use of skin preparations containing peanut oil. The increasing incidence is thought to be due to unduly early exposure of babies to peanut butter after weaning.
References in periodicals archive ?
This sequence did not lead to an increase in the prevalence of peanut allergy (Figure 2).
These infants have the highest risk of developing a peanut allergy and should be evaluated by a physician prior to peanut introduction.
As we embark on the longest trial to date in this patient population, we remain committed to finding a safe and effective treatment for all peanut allergy sufferers.
The early introduction of dietary peanut in children without risk factors for peanut allergy is generally anticipated to be safe and to contribute modestly to an overall reduction in the prevalence of peanut allergy," the researchers said.
The investigators assessed peanut allergy at the beginning of the study with a supervised, oral food challenge with peanut-containing food.
The report provides a snapshot of the global therapeutic landscape of Peanut Allergy
Currently there are no reliable data on peanut allergy prevalence in South Africa (SA), but prevalence studies are underway.
Editor's note: Sanders and Schor review peanut allergy on page 38.
Despite the book's subtitle, which purports to identify a cause, or causes, of peanut allergy, and "how to stop it", the author reaches no definite conclusions.
Among the 530 children who had no signs of peanut allergy (on a skin-prick test) when they entered the study, 14 percent of those who avoided peanut butter--but just 2 percent of those who ate peanut butter--were allergic by age five.
Among 530 babies who had no reaction to the skin test, the peanut allergy rate at age 5 was 13.
He said, in Africa, babies are weaned on peanuts and peanut allergy is hardly seen there.