food allergy

食物アレルギー

WordNet

1. any substance that can be metabolized by an animal to give energy and build tissue (同)nutrient
2. anything that provides mental stimulus for thinking (同)food for thought, intellectual nourishment
3. any solid substance (as opposed to liquid) that is used as a source of nourishment; "food and drink" (同)solid food
4. hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity (同)allergic_reaction

PrepTutorEJDIC

1. 〈U〉『食物』,栄養物 / 〈U〉(飲み物に対して)食べ物 / 〈C〉(特定の種類の)固形食品 / 〈U〉(動植物に)栄養を余えるもの / 〈U〉《比喩(ひゆ)的に》(心・精神の活動を刺激・奨励する)糧(かて);(思考・反省などの)資料
2. アレルギー,異常過敏症

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/09/25 07:30:23」(JST)

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Food allergy
Classification and external resources
ICD-10	T78.0
ICD-9	V15.01-V15.05
OMIM	147050
MedlinePlus	000817
eMedicine	med/806
MeSH	D005512

A food allergy is an adverse immune response to a food protein.

They are distinct from other adverse responses to food, such as food intolerance, pharmacological reactions, and toxin-mediated reactions.

The protein in the food is the most common allergic component. These kinds of allergies occur when the body's immune system mistakenly identifies a protein as harmful. Some proteins or fragments of proteins are resistant to digestion and those that are not broken down in the digestive process are tagged by the Immunoglobulin E (IgE). These tags fool the immune system into thinking that the protein is an invader. The immune system, thinking the organism (the individual) is under attack, sends white blood cells to attack, and that triggers an allergic reaction. These reactions can range from mild to severe. Allergic responses include dermatitis, gastrointestinal and respiratory distress, including such life-threatening anaphylactic responses as biphasic anaphylaxis and vasodilation; these require immediate emergency intervention. Individuals with protein allergies commonly avoid contact with the problematic protein. Some medications may prevent, minimize or treat protein allergy reactions. There is no cure.

Treatment consists of either immunotherapy (desensitisation) or avoidance, in which the allergic person avoids all forms of contact with the food to which they are allergic. Areas of research include anti-IgE antibody (omalizumab, or Xolair) and specific oral tolerance induction (SOTI), which have shown some promise for treatment of certain food allergies. People diagnosed with a food allergy may carry an injectable form of epinephrine such as an EpiPen, or wear some form of medical alert jewelry, or develop an emergency action plan, in accordance with their doctor.

The scope of the problem, particularly for young people, is a significant public health issue.

Classification

Food allergy is thought to develop more easily in patients with the atopic syndrome, a very common combination of diseases: allergic rhinitis and conjunctivitis, eczema and asthma. The syndrome has a strong inherited component; a family history of allergic diseases can be indicative of the atopic syndrome.

Conditions caused by food allergies are classified into 3 groups according to the mechanism of the allergic response:

1. IgE-mediated (classic):

• Type-I immediate hypersensitivity reaction (symptoms described above)
• Oral allergy syndrome

2. IgE and/or non-IgE-mediated:

• Allergic eosinophilic esophagitis
• Allergic eosinophilic gastritis
• Allergic eosinophilic gastroenteritis

3. Non-IgE mediated:

• Food protein-induced Enterocolitis syndrome (FPIES)
• Food protein proctocolitis/proctitis
• Food protein-induced enteropathy. An important example is Celiac disease, which is an adverse immune response to the protein gluten.
• Milk-soy protein intolerance (MSPI) is a non-IgE mediated allergic response to milk and/or soy protein during infancy and early childhood. Symptoms of MSPI are usually attributable to food protein proctocolitis or FPIES.
• Heiner syndrome — lung disease due to formation of milk protein/IgG antibody immune complexes (milk precipitins) in the blood stream after it is absorbed from the GI tract. The lung disease commonly causes bleeding into the lungs and results in pulmonary hemosiderosis.

Signs and symptoms

Hives on the back are a common allergy symptom.

Classic immunoglobulin-E (IgE)-mediated food allergies are classified as type-I immediate Hypersensitivity reaction. These allergic reactions have an acute onset (from seconds to one hour) and may include:

• Hives
• Itching of mouth, lips, tongue, throat, eyes, skin, or other areas
• Swelling (angioedema) of lips, tongue, eyelids, or the whole face
• Difficulty swallowing
• Runny or congested nose
• Hoarse voice
• Wheezing and/or shortness of breath
• Nausea
• Vomiting
• Abdominal pain and/or stomach cramps
• Lightheadedness
• Fainting
• death*

Symptoms of allergies vary from person to person. The amount of food needed to trigger a reaction also varies from person to person.

Serious danger regarding allergies can begin when the respiratory tract or blood circulation is affected. The latter can be indicated through wheezing and cyanosis. Poor blood circulation leads to a weak pulse, pale skin, and fainting.

A severe case of an allergic reaction, caused by symptoms affecting the respiratory tract and blood circulation, is called anaphylaxis. When symptoms are related to a drop in blood pressure, the person is said to be in anaphylactic shock. Anaphylaxis occurs when IgE Antibodies are involved, and areas of the body that are not in direct contact with the food become affected and show symptoms. This occurs because no nutrients are circulated throughout the body, causing the widening of blood vessels. This vasodilation causes blood pressure to decrease, which leads to the loss of consciousness. Those with asthma or an allergy to peanuts, tree nuts, or seafood are at greater risk for anaphylaxis.

Common allergies

One of the most common food allergies is a sensitivity to peanuts, a member of the bean family. Peanut allergies may be severe, but children with peanut allergies sometimes outgrow them. Tree nuts, including pecans, pistachios, pine nuts, coconuts, and walnuts, are also common allergens. Sufferers may be sensitive to one particular tree nut or to many different tree nuts. Also seeds, including sesame seeds and poppy seeds, contain oils where protein is present, which may elicit an allergic reaction.

Egg allergies affect about one in fifty children but are frequently outgrown by children when they reach age five. Typically the sensitivity is to proteins in the white, rather than the yolk.

Milk, from cows, goats or sheep, is another common food allergen, and many sufferers are also unable to tolerate dairy products such as cheese. A small portion of children with a milk allergy, roughly ten percent, will have a reaction to beef. Beef contains a small amount of protein that is present in cow's milk.

Other foods containing allergenic proteins include soy, wheat, fish, shellfish, fruits, vegetables, maize, spices, synthetic and natural colors, and chemical additives.

Although sensitivity levels vary by country, the most common food allergies are allergies to milk, eggs, peanuts, tree nuts, seafood, shellfish, soy and wheat. These are often referred to as "the big eight." Allergies to seeds — especially sesame — seem to be increasing in many countries. An example of allergies more common to a particular region is the surfeit of rice allergies in East Asia where rice forms a large part of the diet.

Balsam of Peru, which is in various foods, is in the "top five" allergens most commonly causing patch test reactions in people referred to dermatology clinics.

Cross reactivity

Some children who are allergic to cow's milk protein also show a cross sensitivity to soy-based products. There are infant formulas in which the milk and soy proteins are degraded so when taken by an infant, their immune system does not recognize the allergen and they can safely consume the product. Hypoallergenic infant formulas can be based on hydrolyzed proteins, which are proteins partially predigested in a less antigenic form. Other formulas, based on free amino acids, are the least antigenic and provide complete nutrition support in severe forms of milk allergy.

People with latex allergy often also develop allergies to bananas, kiwifruit, avocados, and some other foods.

Pathophysiology

Main article: Allergy

A histamine, the structure shown, is what causes a person to feel itchy during an allergic reaction. A common medication to stop this is an antihistamine, which fights the histamines in the person's system.

Allergic reactions are hyperactive responses of the immune system to generally innocuous substances. When immune cells encounter the allergenic protein, IgE antibodies are produced; this is similar to the immune system's reaction to foreign pathogens. The IgE antibodies identify the allergenic proteins as harmful and initiate the allergic reaction. The harmful proteins are those that do not break down due to the strong bonds of the protein. IgE antibodies bind to a receptor on the surface of the protein, creating a tag, just as a virus or parasite becomes tagged. It is not entirely clear why some proteins do not denature and subsequently trigger allergic reactions and hypersensitivity while others do not.

Hypersensitivities are categorized according to the parts of the immune system that are attacked and the amount of time it takes for the response to occur. There are four types of Hypersensitivity reaction: Type 1, Immediate IgE-mediated, Type 2, Cytotoxic, Type 3, Immune complex-mediated, and Type 4, Delayed cell-mediated. The pathophysiology of allergic responses can be divided into two phases. The first is an acute response that occurs immediately after exposure to an allergen. This phase can either subside or progress into a "late phase reaction" which can substantially prolong the symptoms of a response, and result in tissue damage.

Many food allergies are caused by hypersensitivities to particular proteins in different foods. Proteins have unique properties that allow them to become allergens, such as stabilizing forces in the tertiary and quaternary structure which prevent degradation during digestion. Many theoretically allergenic proteins cannot survive the destructive environment of the digestive tract and thus don't trigger hypersensitive reactions.

Acute response

Degranulation process in allergy.
1 — antigen
2 — IgE antibody
3 — FcεRI receptor
4 — preformed mediators (histamine, proteases, chemokines, heparine)
5 — granules
6 — mast cell

7 — newly formed mediators (prostaglandins, leukotrienes, thromboxanes, PAF)

In the early stages of allergy, a type I hypersensitivity reaction against an allergen, encountered for the first time, causes a response in a type of immune cell called a T_H2 lymphocyte, which belongs to a subset of T cells that produce a cytokine called interleukin-4 (IL-4). These T_H2 cells interact with other lymphocytes called B cells, whose role is the production of antibodies. Coupled with signals provided by IL-4, this interaction stimulates the B cell to begin production of a large amount of a particular type of antibody known as IgE. Secreted IgE circulates in the blood and binds to an IgE-specific receptor (a kind of Fc receptor called FcεRI) on the surface of other kinds of immune cells called mast cells and basophils, which are both involved in the acute inflammatory response. The IgE-coated cells, at this stage are sensitized to the allergen.

If later exposure to the same allergen occurs, the allergen can bind to the IgE molecules held on the surface of the mast cells or basophils. Cross-linking of the IgE and Fc receptors occurs when more than one IgE-receptor complex interacts with the same allergenic molecule, and activates the sensitized cell. Activated mast cells and basophils undergo a process called degranulation, during which they release histamine and other inflammatory chemical mediators (cytokines, interleukins, leukotrienes, and prostaglandins) from their granules into the surrounding tissue causing several systemic effects, such as vasodilation, mucous secretion, nerve stimulation and smooth muscle contraction. This results in rhinorrhea, itchiness, dyspnea, and anaphylaxis. Depending on the individual, the allergen, and the mode of introduction, the symptoms can be system-wide (classical anaphylaxis), or localized to particular body systems; asthma is localized to the respiratory system and eczema is localized to the dermis.

Late-phase response

After the chemical mediators of the acute response subside, late phase responses can often occur. This is due to the migration of other leukocytes such as neutrophils, lymphocytes, eosinophils, and macrophages to the initial site. The reaction is usually seen 2–24 hours after the original reaction. Cytokines from mast cells may also play a role in the persistence of long-term effects. Late phase responses seen in asthma are slightly different from those seen in other allergic responses, although they are still caused by release of mediators from eosinophils, and are still dependent on activity of T_H2 cells.

Diagnosis

There are four common types of allergy testing: skin prick test, patch test, blood test, and food challenges. An allergist can perform these tests, and they can also go into further depth depending on the results.

Skin testing on the arm is a common way for detecting an allergy, however, it is not as effective as other tests.

• For skin prick tests, a tiny board with protruding needles is used. The allergens are placed either on the board or directly on the skin. The board is then placed on the skin, in order to puncture the skin and for the allergens to enter the body. If a hive appears, the person will be considered positive for the allergy. This test only works for IgE antibodies. Allergic reactions caused by other antibodies cannot be detected through skin prick tests.

Skin prick testing is easy to do and results are available in minutes. Different allergists may use different devices for skin prick testing. Some use a "bifurcated needle", which looks like a fork with 2 prongs. Others use a "multi-test", which may look like a small board with several pins sticking out of it. In these tests, a tiny amount of the suspected allergen is put onto the skin or into a testing device, and the device is placed on the skin to prick, or break through, the top layer of skin. This puts a small amount of the allergen under the skin. A hive will form at any spot where the person is allergic. This test generally yields a positive or negative result. It is good for quickly learning if a person is allergic to a particular food or not, because it detects allergic antibodies known as IgE. Skin tests cannot predict if a reaction would occur or what kind of reaction might occur if a person ingests that particular allergen. They can however confirm an allergy in light of a patient's history of reactions to a particular food. Non-IgE mediated allergies cannot be detected by this method.

Patch test

• Patch testing is a method used to determine if a specific substance causes allergic inflammation of the skin. It tests for delayed food reactions.

• Blood testing is another way to test for allergies; however, it poses the same disadvantage and only detects IgE allergens and does not work for every possible allergen. RAST, RadioAllergoSorbent Test, is used to detect IgE antibodies present to a certain allergen. The score taken from the RAST test is compared to predictive values, taken from a specific type of RAST test. If the score is higher than the predictive values, there is a great chance the allergy is present in the person. One advantage of this test is that it can test many allergens at one time.

Blood tests are another useful diagnostic tool for evaluating IgE-mediated food allergies. For example, the RAST (RadioAllergoSorbent Test) detects the presence of IgE antibodies to a particular allergen. A CAP-RAST test is a specific type of RAST test with greater specificity: it can show the amount of IgE present to each allergen. Researchers have been able to determine "predictive values" for certain foods. These predictive values can be compared to the RAST blood test results. If a persons RAST score is higher than the predictive value for that food, then there is over a 95% chance the person will have an allergic reaction (limited to rash and anaphylaxis reactions) if they ingest that food. Currently, predictive values are available for the following foods: milk, egg, peanut, fish, soy, and wheat. Blood tests allow for hundreds of allergens to be screened from a single sample, and cover food allergies as well as inhalants. However, non-IgE mediated allergies cannot be detected by this method. Other widely promoted tests such as the antigen leukocyte cellular antibody test (ALCAT) and the Food Allergy Profile are considered unproven methods, the use of which is not advised.

• Food challenges test for allergens other than those caused by IgE allergens. The allergen is given to the person in the form of a pill, so the person can ingest the allergen directly. The person is watched for signs and symptoms. The problem with food challenges is that they must be performed in the hospital under careful watch, due to the possibility of anaphylaxis.

Food challenges, especially double-blind placebo-controlled food challenges (DBPCFC), are the gold standard for diagnosis of food allergies, including most non-IgE mediated reactions. Blind food challenges involve packaging the suspected allergen into a capsule, giving it to the patient, and observing the patient for signs or symptoms of an allergic reaction.

The best method for diagnosing food allergy is to be assessed by an allergist. The allergist will review the patient's history and the symptoms or reactions that have been noted after food ingestion. If the allergist feels the symptoms or reactions are consistent with food allergy, he/she will perform allergy tests.

• Additional diagnostic tools for evaluation of eosinophilic or non-IgE mediated reactions include endoscopy, colonoscopy, and biopsy.

Differential diagnosis

Important differential diagnoses are:

• Lactose intolerance; this generally develops later in life but can present in young patients in severe cases. This is due to an enzyme deficiency (lactase) and not allergy. It occurs in many non-Western people.
• Celiac disease; this is an autoimmune disorder triggered by gluten proteins such as gliadin (present in wheat, rye and barley). It is a non-IgE mediated food allergy by definition.
• Irritable bowel syndrome (IBS)
• C1 esterase inhibitor deficiency (hereditary angioedema); this rare disease generally causes attacks of angioedema, but can present solely with abdominal pain and occasional diarrhea.

Possible causes

Nobel Laureate Charles Richet discovered that proteins injected into animals caused them to develop sensitization to those proteins. Subsequent exposure to those proteins would result in anaphylaxis – a term he coined. The detailed mechanism of such allergy development is described in the Acute response section.

Today, it is common to induce food allergy in laboratory mice by injecting them with food proteins along with alum as an adjuvant.

Multiple routes of food protein administration have been shown to cause food allergies in humans.

Tick bites can cause alpha-gal to be injected. Alpha-gal is a protein found in red meat. The result is tick bite victims develop red meat allergy.

Stomach acids degrade food proteins. Stomach acid reducing medications such as proton pump inhibitors (PPI), affect protein degradation. When stomach acid is reduced, intact food proteins are absorbed into the blood stream resulting in the development of food allergies.

Vaccines such as DTaP, contain food proteins such as gelatin. Gelatin-containing DTaP has been shown to cause gelatin allergy.

Antibiotic use increasing the likelihood of food allergies was supported by a case-control study examining 7,533 children that was presented at the 2013 annual meeting of the American Academy of Allergy, Asthma & Immunology.

Prevention

According to a report issued by the American Academy of Pediatrics:

There is evidence that breastfeeding for at least 4 months, compared with feeding infants formula made with intact cow milk protein, prevents or delays the occurrence of atopic dermatitis, cow milk allergy, and wheezing in early childhood.

In order to avoid an allergic reaction, a strict diet can be followed. It is difficult to determine the amount of allergenic food required to elicit a reaction, so complete avoidance should be attempted unless otherwise suggested by a qualified medical professional. In some cases, hypersensitive reactions can be triggered by exposures to allergens though skin contact, inhalation, kissing, participation in sports, blood transfusions, cosmetics, and alcohol.

When avoiding certain foods in order to lessen the risk of reaction, it can be difficult to maintain the proper amounts of nutrients. Some allergens are also common sources of vitamins and minerals, as well as macronutrients such as fat and protein; healthcare providers will often suggest alternate food sources of essential vitamins and minerals which are less allergenic.

Treatment

The mainstay of treatment for food allergy is total avoidance of the foods that have been identified as allergens. An allergen can enter the body by consuming a food containing the allergen, and can also be ingested by touching any surfaces that may have come into contact with the allergen, then touching the eyes or nose. For people who are extremely sensitive, avoidance includes avoiding touching or inhaling the problematic food.

If the food is accidentally ingested and a systemic reaction (anaphylaxis) occurs, then epinephrine should be used. It is possible that a second dose of epinephrine may be required for severe reactions. The person should then be transported to the emergency room, where additional treatment can be given. Other treatments include: antihistamines, and steroids.In a severe case, neither steroids nor anihistamines are life saving and its use should be limited to adjuvant therapy following epinephrine administration.

Epinephrine

Epinephrine is another name for the hormone adrenaline, which is produced naturally in the body. An epinephrine shot is the first-line treatment for severe allergic reactions (known as anaphylaxis). If administered in a timely manner, epinephrine can reverse the effects of anaphylaxis.

Epinephrine auto-injectors are portable single-dose epinephrine-dispensing devices used to treat anaphylaxis.

Epinephrine relieves airway swelling and obstruction and improves blood circulation; blood vessels are tightened and heart rate is increased, improving circulation to bodily organs. Epinephrine is available by prescription in an auto-injector which is used in the treatment of anaphylaxis.

Antihistamines

Antihistamines can alleviate some of the milder symptoms of an allergic reaction, but do not treat all symptoms of anaphylaxis. Antihistamines block the action of histamine, which causes blood vessels to dilate and become leaky to plasma proteins. Histamine also causes itchiness by acting on sensory nerve terminals. The most common antihistamine given for food allergies is diphenhydramine, also known as Benedryl.

Steroids

Steroids are used to calm down the immune system cells that are attacked by the chemicals released during an allergic reaction. This form of treatment in the form of a nasal spray should not be used to treat anaphylaxis, for it only relieves symptoms in the area in which the steroid is in contact. Another reason steroids should not be used to treat anaphylaxis is due to the long amount of time it takes to reduce inflammation and start to work. Steroids can also be taken orally or through injection. By taking a steroid in these manners, every part of the body can be reached and treated, but a long time is usually needed for these to take effect.

Desensitization

For food allergy, desensitization through sublingual, oral or epicutaneous immunotherapy is possible for a subset of people, but not all. While not a cure, this program enables food allergic children and adults to consume foods that they were allergic to previously, without any allergic reaction.

Desensitization approaches for food allergy are generally at the research stage. They include:

• oral immunotherapy, which involves building up tolerance by eating a small amount of (usually baked) food;
• sublingual immunotherapy, which involves placing a small drop of milk or egg white under the tongue;
• epicutaneous immunotherapy, which injects the allergic food under the skin;
• monoclonal anti-IgE antibodies, which non-specifically reduce the body's capacity to produce an allergic reaction; and
• use of probiotics;
• helminthic therapy; and
• a drug to suppress Toll-like receptor 9 (TLR9).

Traditional Chinese Medicine

As of early 2012, phase II clinical trials for human efficacy have gotten underway for a formula called FAHF-2 (food allergy herbal formula 2). This formula is based on a long-used Traditional Chinese Medicine formula for parasite infection. In early clinical trials, it has been found to completely block anaphylaxis in mouse models.

Vaccines

Prof. Dr. Ronald van Ree of The University of Amsterdam and The Academic Medical Center theorizes that vaccines can be created using genetic engineering to cure allergies.

Epidemiology

The most common food allergens include peanuts, milk, eggs, tree nuts, fish, shellfish, soy, and wheat — these foods account for about 90% of all allergic reactions. The most common food allergies in adults are shellfish, peanuts, tree nuts, fish, and egg. The most common food allergies in children are milk, eggs, peanuts, and tree nuts.

Six to eight percent of children under the age of three have food allergies and nearly four percent of adults have food allergies.

For reasons that are not entirely understood, the diagnosis of food allergies has apparently become more common in Western nations in recent times. In the United States, food allergy affects as many as 5% of infants less than three years of age and 3% to 4% of adults. There is a similar prevalence in Canada.

Seventy-five percent of children who have allergies to milk protein are able to tolerate baked-in milk products, i.e., muffins, cookies, cake and hydrolysed formulas.

About 50% of children with allergies to milk, egg, soy, peanuts, tree nuts and wheat will outgrow their allergy by the age of 6. Those that are still allergic by the age of 12 or so have less than an 8% chance of outgrowing the allergy.

Peanut and tree nut allergies are less likely to be outgrown, although evidence now shows that about 20% of those with peanut allergies and 9% of those with tree nut allergies will outgrow them.

In Central Europe, celery allergy is more common. In Japan, allergy to buckwheat flour, used for soba noodles, is more common.

Meat allergy is extremely rare in the general population, but a geographic cluster of people allergic to meat has been observed in Sydney, Australia. There appears to be a possible association between localised reaction to tick bite and the development of meat allergy.

Fruit allergies exist, such as to apples, peaches, pears, jackfruit, strawberries, etc.. This is suspected to be associated with ragweed pollen allergy but could be due to other factors.

Corn allergy may also be prevalent in many populations, although it may be difficult to recognize in areas such as the United States and Canada where corn derivatives are common in the food supply.

Protein allergies or intolerance of seeds, nuts, meat, and milk are especially common among children.

Society and culture

In response to the risk that certain foods pose to those with food allergies, some countries have responded by instituting labeling laws that require food products to clearly inform consumers if their products contain major allergens or by-products of major allergens. Some countries also require companies to warn customers when food has been prepared around certain allergens that have been known to cause severe reactions.

See also

• Food allergy in the United States
• Food intolerance, non-allergic food hypersensitivity
• Hygiene hypothesis
• List of food allergies
• SEICAP

Footnotes

References

• Alberts, Bruce; Bray, Dennis; Hopkin, Karen; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter (2010). "Protein Structure and Function". Essential Cell Biology (3rd ed.). New York: Garland Science, Taylor and Francis Group. pp. 120–170. 
• Fernández de Corres L, Moneo I, Muñoz D, Bernaola G, Fernández E, Audicana M, Urrutia I (January 1993). "Sensitization from chestnuts and bananas in patients with urticaria and anaphylaxis from contact with latex". Ann Allergy 70 (1): 35–9. PMID 7678724. 
• Frankel, Edward (1991). Poison Ivy, Poison Oak, Poison Sumac and Their Relatives; Pistachios, Mangoes and Cashews. Pacific Grove CA: Boxwood Press. ISBN 0-940168-18-9. 
• Freeman, Scott (2008). "Protein Structure and Function". Biological Science (3rd ed.). San Francisco CA: Pearson Education. pp. 43–65. 
• Food Allergy and Anaphylaxis Network. Network. 2008. Accessed 25 Mar 2010.
• Hogan, C.Michael. Western poison-oak: Toxicodendron diversilobum. GlobalTwitcher, ed. Nicklas Stromberg. 2008. Accessed 30 April 2010.
• American Academy of Allergy, Asthma and Immunology. Allergies. 2010. Accessed 25 Mar 2010.
• Food and Drug Administration. USFDA: Allergies. United States Department of Health and Human Services. 2010. Accessed 27 Mar 2010.
• Mayo Clinic Food Allergy. 2010. Accessed 27 Apr 2010.
• High Protein foods. Foods. High Protein Foods.net, 2004. Accessed 21 Mar 2010.
• Icahn School of Medicine at Mount Sinai. Food allergy. 2010. Accessed 25 Mar 2010.
• Nester, Eugene W.; Anderson, Denise G.; Roberts, Jr, C. Evans; Nester, Martha T. (2009). "Immunologic Disorders". Microbiology: A Human Perspective (6th ed.). New York: McGraw-Hill. pp. 414–428. 
• Sicherer, Scott H. (2006). Understanding and Managing Your Child's Food Allergy. Baltimore: Johns Hopkins University Press. 
• Stanford Alliance for Food Allergy Research (SAFAR) SAFAR. California 2013. Accessed 8 Mar 2013.
• Zuidmeer L, van Ree R (June 2007). "Lipid transfer protein allergy: primary food allergy or pollen/food syndrome in some cases". Curr Opin Allergy Clin Immunol 7 (3): 269–73. doi:10.1097/ACI.0b013e32814a5401. PMID 17489047. 

Bibliography

• "Food Allergies and Intolerances Resource List for Consumers". Food and Nutrition Information Center, National Agricultural Library. December 2010.  – a collection of resources on the topic of food allergies and intolerances
• Weissman, Susan, Feeding Eden: The Trials and Triumphs of a Food Allergy Family, New York : Sterling Publishing Co., Inc., March 6, 2012. ISBN 978-1-4027-8122-3
• Thernstrom, M. (2013, March 7). The Allergy Buster: Can a Radical New Treatment Save Children With Severe Food Allergies? New York Times Magazine. Retrieved from http://www.nytimes.com.

External links

• Food Allergy, Merck Manual

UpToDate Contents

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• 1. 食物アレルギーの臨床症状：概要 clinical manifestations of food allergy an overview
• 2. 食物アレルギーの診断的評価 diagnostic evaluation of food allergy
• 3. 小児期の食物アレルギー：有病割合、自然経過、および寛解までのモニタリング food allergy in children prevalence natural history and monitoring for resolution
• 4. 食物アレルギーのマネージメント：回避策 management of food allergy avoidance
• 5. 食物アレルギーの病因 pathogenesis of food allergy

English Journal

• Vicilin and the basic subunit of legumin are putative chickpea allergens.

• Bar-El Dadon S, Pascual CY, Eshel D, Teper-Bamnolker P, Paloma Ibáñez MD, Reifen R.SourceThe School of Nutritional Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 76100 Rehovot, Israel.
• Food chemistry.Food Chem.2013 May 1;138(1):13-8. doi: 10.1016/j.foodchem.2012.10.031. Epub 2012 Nov 2.
• IgE-mediated reactions to food allergens constitute a major health problem in industrialized countries. Chickpea is consumed in Mediterranean countries, and reportedly associated with IgE-mediated hypersensitivity reactions. However, the nature of allergic reactions to chickpea has not been characte
• PMID 23265449

• Redefining the major peanut allergens.

• Zhuang Y, Dreskin SC.SourceDivision of Allergy and Clinical Immunology, Department of Medicine, University of Colorado School of Medicine, 12700 E. 19th Ave., Room 10C03, Aurora, CO, 80045, USA.
• Immunologic research.Immunol Res.2013 Mar;55(1-3):125-34. doi: 10.1007/s12026-012-8355-x.
• Food allergy has become a major public health concern in westernized countries, and allergic reactions to peanuts are particularly common and severe. Allergens are defined as antigens that elicit an IgE response, and most allergenic materials (e.g., pollens, danders, and foods) contain multiple alle
• PMID 22948807

• Maternal and newborn vitamin D status and its impact on food allergy development in the German LINA cohort study.

• Weisse K, Winkler S, Hirche F, Herberth G, Hinz D, Bauer M, Röder S, Rolle-Kampczyk U, von Bergen M, Olek S, Sack U, Richter T, Diez U, Borte M, Stangl GI, Lehmann I.SourceDepartment of Environmental Immunology, Helmholtz Centre for Environmental Research - UFZ, Leipzig.
• Allergy.Allergy.2013 Feb;68(2):220-8. doi: 10.1111/all.12081. Epub 2012 Dec 18.
• BACKGROUND: Vitamin D levels are known to be associated with atopic disease development; however, existing data are controversial. The aim of this study was to investigate whether corresponding maternal and cord blood vitamin D levels are associated with atopic outcomes in early infancy.METHODS: Wit
• PMID 23253182

Japanese Journal

• 日本における食物アレルギー児をもつ母親に関する研究の現状

• 鈴木 美佐
• 聖泉看護学研究 2, 103-110, 2013-04-00
• 背景 わが国における育児環境は大きく変化し,乳幼児を育てる母親の育児不安や育児ストレスは深刻な状況にある.慢性疾患をもつ児の母親の育児ストレスは健康児の母親より強く,児側の要因が母親の育児不安やストレスと関連することが明らかにされている.乳幼児期に多く発症する食物アレルギー(以下FAとする)は,いまだ治療法の確立には至っておらず,除去食管理を担う母親には様々な負担が存在することが報告されている.食 …
• NAID 110009585922

• 抗アレルギー作用を有する食品成分-地域食資源の探索と必須脂肪酸バランス改善食品の効果-

• 池本 敦
• 秋田大学教育文化学部研究紀要. 自然科学 68, 7-16, 2013-03-31
• NAID 110009560951

• 食物アレルギーと子育て環境 : 予防の観点から

• 沼野 みえ子,Numano Mieko
• 人間生活学研究 4, 35-40, 2013-03-00
• NAID 120005301249

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• Home - Food Allergy Research & Education

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• 食物アレルギーねっと ～アレルギー、アレルゲン情報サイト～

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★リンクテーブル★

リンク元	「食物アレルギー」「food hypersensitivity」「alimentary allergy」「食事性アレルギー」

「食物アレルギー」

　　[★]

英

food allergy

同

食事性アレルギー、食品アレルギー、food hypersensitivity、alimentary allergy

関

食品過敏症、食物過敏症。アレルギー物質。アナフィラキシー

概念

• I型アレルギーの機序

検査

参考1

• 検査方針：まず問診や血液検査で原因となる食物(抗原)を特定し、確定診断として食物除去試験・食物負荷試験を施行する。

皮膚テスト

プリックテスト

• 感度　：高( = 血中抗原特異的IgE抗体検査 )
• 特異度：低( ＜ 食物負荷試験 )

皮内テスト

• ショックの危険性や偽陽性率が高いため診断のためには施行されない。

食物除去試験

• 疑わしい原因食物を1-2週間完全除去し、臨床症状の改善が得られるかどうかを観察する。

食物負荷試験

• 専門の医師が入院設備のある施設で行うことが望ましい。
• 食物負荷試験は、原因抗原診断のためと耐性獲得の判断のための2通りの目的で行う。

耐性化

• 耐性化しやすい：鶏卵、牛乳、小麦、大豆
• 長期間経ないと耐性化しにくい：ピーナッツ、ナッツ類、ゴマ、魚

参考

• 1. アレルギー情報センター ＞ ガイドライン ＞ 食物アレルギー

http://www.allergy.go.jp/allergy/guideline/index.html

「food hypersensitivity」

　　[★]

食物アレルギー、食物過敏症、食品アレルギー、食品過敏症

関

alimentary allergy、food allergy

「alimentary allergy」

　　[★]

• 食物アレルギー、食事性アレルギー

関

food allergy、food hypersensitivity

「食事性アレルギー」

　　[★]

英

food allergy、alimentary allergy

関

食物アレルギー、食品過敏症