A hypersensitive state of the immune response, wherein exposure to a particular substance (an allergen) results in a noxious and sometimes physically harmful immunologic response.

a state of hypersensitivity to substances normally considered in-offensive - food, medicine, etc. symptoms may be watering of the eyes, running of the nnose, swelling, itching, breathging difficulty, pain, or digestive upsets. old cats often have food allergies that cause them to scratch themselves and lick their coats. often a change of diet suffices as a cure.

a bodily reaction to an irritant. Skin allergies can be exacerbated by solutions put on the kin and my metals in some cases.

A condition in which the body has an exaggerated response to a substance (e.g. food or drug). Also known as hypersensitivity.

A condition of the immune system which causes someone to be sensitive to a substance so that when exposed to it they suffer symptoms such as a rash or shortness of breath. Hayfever is an allergy to pollen.

Sensitivity to a substance so that the body reacts adversely to any contact with that substance. Varies in degree from a mild to a life-threatening reaction. Retraction of the skin of the piercing away from the jewelry is sometimes a sign of allergy. See also Hypersensitivity

An abnormal sensitivity based on the reaction of the body's immune system to a substance or substances which are generally harmless to others.

exaggerated response by the immune system in susceptible individuals. Signs of allergic reactions include sneezing, coughing, nausea, vomiting, diarrhea, and rashes.

an immune reaction of the body which causes discomfort and possible harm.

Ger. allergie: altered reaction] • An overreaction to an antigen in amounts that do not affect most people; often involves IgE antibodies.

(AL lur jee): An abnormally high sensitivity to certain substances, such as pollen or certain foods.

a condition where an individual is hypersensitive to an allergen. It results in tissue damage.

(allergic, adjective) An abnormally high sensitivity to certain substances, such as pollens or foods. Common symptoms may include sneezing, itching, and skin rashes.

an exaggerated and inappropriate immune reaction, which causes damage to body tissues or other unpleasant effects.

an exuberant immune response directed against a substance that is recognized as foreign to the body (i.e. an antigen* although in this case it is referred to as an allergen*). Many different forms of allergy exist from anaphylactic shock (which can be lethal) through asthma* and various forms of food allergy to common hay fever.

Allergies are inappropriate or exaggerated reactions of the immune system to substances that, in the majority of people, cause no symptoms. Symptoms of the allergic diseases may be caused by different exposures such as a certain chemical affecting the skin, dust or pollen particles affecting the respiratory system, or particular foods affecting the stomach and intestines.

An exaggerated response to a substance or condition produced by the release of histamine or histamine-like substances in affected cells.

Symptoms or signs occurring in sensitized individuals following exposure to a previously encountered substance (allergen) which would otherwise not cause such symptoms or signs in non-sensitized individuals. The most common forms of allergy are rhinitis, urticaria, asthma, and contact dermatitis. RT immune response, hypersensitivity.

When a person is very sensitive to certain foods, liquids, pollen, or animals. The allergy can make the person ill, including sneezing, itching, and rashes. Severe allergies can even be fatal (cause death). Some organisms which cause uncomfortable allergies with people include Ragweed (pollen), Poison Ivy (oil), and Honey Bees (venom). [Go to source

Excessive sensitivity to a substance.

A misguided reaction to a foreign substance by the immune system-the body's system of defense against foreign invaders (pollens, dust mite, molds, dander, and certain foods or infections. The allergic reaction is misguided because these foreign substances or triggers (allergens) are usually otherwise harmless, such as cow's milk protein or penicillin.

A condition in which the immune system becomes hypersensitive and responds defensively to a normally harmless substance, causing symptoms such as skin irritation, itchy eyes, breathing difficulties and a runny nose.

abnormal reaction to a stimulus called an allergen. Allergy refers to the abnormal response of the airways to inhaled stimuli, such as pollen, or to consumed items, such as foods, that may cause unusual airway reactions and lead to bronchospasm.

A hypersensitivity (characterised by a damaging immune response) to an allergen or substance in a person's environment such as dust, pollen, fur or a chemical. Can manifest as hayfever, skin rash, asthma, food allergies etc. Referred to as an allergic reaction.

we define allergy as being an altered state or response by the body to any substance. IgE mediated responses we prefer to call Atopy rather than allergy.

an adverse immune reaction to a protein or allergen in the environment that is normally harmless to the non-allergic individual.

State of altered immune reactivity, resulting in reaction to foreign substances (food, airborne particles, etc.) that would not cause any reaction in a normal individual.

condition in which an initial symptomless exposure to a specific allergen later gives rise to a sensitivity to further exposure.

immunological hypersensitivity to certain foreign antigens.anemia – reduction of red blood cells or hemoglobin. The red cells contain the protein ‘hemoglobin’ which binds oxygen in the red blood cell. This allows the transport of oxygen from the lungs to the tissues. Symptoms include weakness, reluctance to exercise, pale mucus membranes, and tachycardia (abnormally rapid heart rate).

Defensive responsive of the body to "foreign elements." Includes symptoms of cold, asthma, etc.

An unusually high sensitivity to normally harmless substances such as pollens, foods, or microorganisms. Common symptoms include sneezing, itching, eye irritation, and rashes.

This is a condition that involve an immunity in the body against a variety of things that can come into the body including grasses, pollens, molds, etc. The immunity that results is a special one involving an antibody called IgE. This antibody when it combines with the allergen (pollen, mold, antibiotics) causes the immune system to make inflammation that can result in itching, asthma, red eyes etc.

A disorder in which the body is excessively sensitive to particular substances, called allergens, which on contact cause symptoms from asthma and hay fever to dermatitis and even serious shock.

Hypersensitivity to a foreign protein which produces a violent reaction eg. Hayfever, asthma, irritable bowel.

(al-er-jee) - is your body's reaction to animals, flowers, plants, food, insects, and other things. Some people are affected by them, others are not. Same as Allergic Reaction.

Allergy is a broad term applied to disease symptoms following exposure to a previously encountered substance (allergen), often one which would otherwise be classified as harmless; essentially a malfunction of the immune system. In most cases, allergy involves an abnormally high, acquired sensitivity to certain substances, such as drugs, pollens or microorganisms, which may include such symptoms as sneezing, itching and skin rashes.

An abnormal immune system response to any stimulus that can take any of 4 different types of reaction characteristics (Immediate/IgE-Mediated, Cytotoxic, Immune Complex-Mediated or Delayed/IgG-Mediated/Cell-Mediated); the classic working definition used by most physicians only includes immediate response allergic reactions (IgE-Mediated).

The body's immune system reacts rapidly against foreign substances, most allergic reactions e.g. Hives (Itchy raised bumps) are usually successfully treated with Antihistamines. The most serious form of allergic reaction is ‘Anaphylaxis'.

an excessive response to a substance that is normally harmless

A disorder in which the body becomes hyper- sensitive to particular Antigens which can cause cell damage and inflammation.

Hypersensitivity or reaction caused by a substance or ingredient.

Sarne as hypersensitivity (see also " Sensitivity", Understanding Toxic Substances). An allergy is a reaction to a substance that occurs through a change in the immune system caused by the production of antibodies, and is usually experienced by only a small number of people exposed to a substance. Allergic reactions in the workplace tend to affect the skin (see Dermatitis) and lung (see Asthma).

Medically the term is more specific, but for purposes of this site, an allergy is defined as any physical or emotional reaction to a substance or energy that a large number of other people don’t react to. The symptoms of reaction can include acne, brain fog, digestive upset, fatigue, depression, headaches, sinusitis, weight problems, addictions and virtually anything in between. An allergen - the thing that causes the allergic reaction - can be living or not, and can trigger a reaction by contact, inhalation, ingestion and exposure (such as is the case with sunlight and other energies).

Symptoms induced by exposure to an allergen to which previous sensitization has occurred.

a hypersensitivity to a chemical, food, drug, metal, sunlight, or other substance.

unusual sensitivity to particular food, particles, irritants, etc.

A sensitivity to an otherwise harmless substance.

A condition where in some people their immune system reacts to common substances in the environment to which most other people don’t react. Examples of these common substances are dust, pets, pollens and molds. These substances are also called “ allergens” or “ triggers”. Typical symptoms include a runny and stuffy nose, sneezing, and itching, but allergies can also cause breathing problems like asthma or skin symptoms as well.

An allergic reaction is caused when the human body reacts to something that has entered the body through an airway and the body has detected this as a foreign substance that must be rid of the body immediately. Many of these "foreign" substances are usually harmless and sometimes include danders, pollen, certain foods and molds.

a normal body reaction caused when the immune system mistakenly identifies a usually harmless substance as damaging to the body.

An inappropriate immune response to a harmless agent. Individuals may be allergic to just one antigen or a variety

a word used to describe an abnormal immune system response to a substance (allergen) that would otherwise be harmless.

a hypersensitive reaction to a normally harmless substance that does not bother most people. People who have allergies often are sensitive to more than 1 substance.

excessive and specific reaction of a person in contact with a foreign substance or allergen that does not induce a disorder in the majority of subjects. The allergy occurs when this person has been previously affected by the same foreign substance (sensitization). Ambrosia Artemisiifolia (short ragweed): this is ragweed (with ragweed leaves) whose pollen is often the cause of allergy.

A reaction by the body's immune system after exposure to a particular substance, often a protein.

An acquired, abnormal immune response to a substance (allergen) that does not normally cause a reaction; Contact with the allergen results in a broad range of inflammatory responses

a hypersensitive state acquired through exposure to a particular allergen, reexposure bringing to light an altered capacity to react.

An unduly sensitive state involving the immune system and resulting from exposure to particular foreign substances.

An overreaction by the body's immune system to a specific foreign substance (allergen). An allergy occurs only in people sensitive to a particular allergens .

Hypersensitivity of the body to a substance

A bodily reaction to an allergen which releases histamine, prostaglandins and leukotrienes and produces allergy symptoms.

an exaggerated or inappropriate immune response initiated by exposures to antigens such as mold spores, pollen, or certain drugs and foods background level - the average presence of a chemical substance or microorganism in the environment, originally referring to naturally occurring phenomena

an acquired, abnormal immune response to a substance that can cause a broad range of inflammatory reactions.

hypersensitivity caused by a foreign substance, small does of which can cause violent body reactions

a damaging immune system response to a substance to which a person has become hypersensitive

A condition in which the body has an exaggerated (immune) response to a substance, like a vaccine. Also known as hypersensitivity.

An unfavorable systemic reaction to a foreign substance or drug. Alveolar bone: The portion of the jawbone that anchors the roots of teeth.

Hypersensitivity caused by exposure to a particular antigen (allergen), resulting in an increased reactivity to that antigen on subsequent exposure, sometimes with harmful immunologic consequences.

unusual sensitivity to the action of food, pollens, insect bites etc. You should find out about any allergies your pupils may have to foods or materials before using them in the classroom. You should get parental approval for activities that involve tasting food.

Doctors in this field diagnose and treat immune system disorders, including asthma and rhinitis, as well as allergic reactions to substances such as food, medications and insect stings.

When the body has a bad reaction to a usually harmless substance (an allergen). This is caused by an antibody (see below) and is an allergy. Allergy symptoms include hives, watery eyes, runny nose, and in some cases, asthma.

hypersensitivity to some environmental agent or drug. Most allergic reactions are minor (sneezing, runny nose), but some are life-threatening and require prompt medical attention.

an immune response to an antigen (allergen) that does not normally cause an adverse reaction (e.g., animal dander, pollen). Allergic reactions are mediated by the release of histamine by mast cells. Allergic symptoms may include runny nose (rhinitis), sneezing, skin rash, asthma or anaphylactic shock.

An unusual response to a small amount of a foreign substance that normally does not cause a reaction in another person

a reaction of the body (such as sneezing or coughing) to a substance (such as grass or pollen) that is usually harmless to other people

Reaction of the body's immune system to a foreign substance (e.g., pollen, animal dander, etc.). When the eyes are affected, the most common symptoms are redness, itching, chemosis, tearing, swollen eyelids and stickiness. Read more about allergies and the eyes.

A person's reaction to a specific irritant. Often, an allergic reaction produces swelling of the mucous membranes in the nose and mouth, which may interfere with vocalization.

A food allergy is any adverse reaction to an otherwise harmless food or food component (a protein) that involves the body's immune system. To avoid confusion with other types of adverse reactions to foods, it is important to use the terms "food allergy" or "food hypersensitivity" only when the immune system is involved in causing the reaction.

A general term describing the immune response to certain substances, which leads to inflammation and the other effects common to this affliction.

reaction to an allergen; usually characterized by redness, itching, or swelling

Allergies are inappropriate or exaggerated reactions of the immune system to substances that, in the majority of people, cause no symptoms. Symptoms of the allergic diseases may be caused by exposure of the skin to a chemical, of the respiratory system to particles of dust or pollen (or other substances), or of the stomach and intestines to a particular food.

Unfavorable systemic response to a foreign substance or drug

A hypersensitive state acquired through exposure to a particular allergen. Re-exposure to the same allergen elicits an exaggerated reaction.

Sensitivity to a substance, accompanied by sneezing, itching, watery eyes, difficulty breathing or rashes.

The state where a person who is sensitive to a substance suffers an excessive reaction when coming into contact with it a second time.

a physiological reaction caused when the immune system mistakenly identifies a normally harmless substance as damaging to the body.

When the body becomes hypersensitive to something you eat, breathe or touch.

A misguided reaction to foreign substances by the immune system , the body system of defense against foreign invaders, particularly pathogens (the agents of infection ). The allergic reaction is misguided in that these foreign substances are usually harmless. The substances that trigger allergy are called allergen. Examples include pollens , dust mite, molds , danders , and certain foods. People prone to allergies are said to be allergic or atopic . See the entire definition of Allergy

A condition in which the body has an exaggerated response to a substance. Also known as hypersensitivity. Common allergens that cause characteristic symptoms when encountered, ingested, or inhaled: chemicals, cosmetics, dust, drugs, feathers, foods, and pollen

A state of hypersensitivity induced by exposure to a particular allergen resulting in harmful immunologic reactions on subsequent exposures.

A condition in which the body is unable to tolerate certain foods, animals, plants, or other substances.

The mounting of inappropriate immune responses to one or more harmless substances. The result is the onset of an excessive inflammatory reaction (see Allergies).

an altered immune response caused by a specific substance.

People have an allergy, strictly speaking only if their acute adverse reactions to chemicals have demonstrable abnormal effects on their immune system. There are many kinds of adverse acute reactions and the general term `intolerance' is used to cover them, but only a portion of these demonstrably involve the immune system, in so far as that is currently understood. AIlergic reactions are therefore that sub-set of intolerant reactions which depend upon a mecnanism which immunologists are currently capable of identifying.

extreme reaction to drug element.

An inappropriate and harmful response of the immune system to normally harmless substances.

An inappropriate response by the immune system to a normally harmless substance. Allergies can effect any of the body's tissue.

hypersensitivity to substances which are foreign to the body. Such substances can include pollens, foods, dust, microorganisms and so forth.

an excessively sensitive state involving the immune system as a result of exposure to certain substances, usually proteins.

A term covering immune reactions to non-pathogenic antigens, which lead to inflammation and deleterious effects in the host.

A reaction of the immune system of an allergic person to substances that are harmless to most people.

Treatment of hay fever, asthma, and other allergic disorders.

an over-reaction of the body's immune system. See allergy for more information.

An overly aggressive response by the body's immune system to foods that non-sufferers would find harmless.

Itching, redness, swelling, or other skin reactions that might develop when you become sensitized by exposure to an allergen (the technical word for "allergy creator"). Allergy-tested products are often made without fragrances and preservatives, the two most common causes of cosmetic allergies. These products are tested on people with allergen-sensitive skin to show they cause no reactions.

Immunological hypersensitivy to certain foreign antigens.

The ability of the body to create a histamine response to fight a normally harmless substance. These reactions are in response to exposure by the body to a substance at some unpredictable time in the past, and before this response takes place. In the skin, these responses most often take the form eczema, edema, or hives, if severe enough, an allergic reaction can be fatal.

An abnormal response of a hypersensitive person to chemical and physical stimuli. Allergic manifestations of major importance occur in about 10 percent of the population.

IgE antibody response to allergens such as insect venom, dust mites, pollen, pet dander, drugs or some foods.

Allergy refers to a hypersensitive state due to exposure to a particular allergen; classified as immediate or delayed; includes serum sickness, allergic drug reactions, contact dermatitis and anaphylactic shock; usually manifested in the gastrointestinal tract, the skin, and the respiratory tract.

Body's reaction to a substance.

A state of immunologically mediated hypersensitivity to a foreign material that is inhaled, ingested, or touched.

An exaggerated immune response to a substance (an allergen). Allergy occurs on the second or subsequent exposure to the allergen. Substances that may cause an allergic reaction in cats include pollens, certain foods, and flea saliva.

A hypersensitive reaction to common, often harmless substances, most of which are found in the environment.

The body's reaction to any foreign substance to which a person may be sensitive; can range from mild to severe to life threatening.

harmful immune reaction, either immediate-type or delayed-type hypersensitivity caused by a foreign antigen (i.e. allergen) in food, pollen, or chemicals. In most cases the cause of the allergy is otherwise harmless to the body find all NHC pages containing: allergy

An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms. Common indications of allergy may include sneezing, itching, and skin rashes.

Originally defined as altered reactivity on second contact with antigen; now usually refers to a Type I hypersensitivity reaction.

If you have an allergy – or are allergic to something – your body reacts abnormally to that thing; it has an "allergic reaction" to it. There are a variety of allergic reactions; the symptoms of "hay fever," including itchy, watery eyes, runny nose, and nasal congestion, are one type of allergic reaction. The substance(s) you are allergic to are called allergens.

a negative reaction to a substance that in most people causes no reaction

An exaggerated immune response to substances in the environment.

The word "allergy" was coined by the Viennese pediatrician Clemens von Pirquet in 1906.Clemens Peter Pirquet von Cesenatico Pirquet noted that some of his patients were hypersensitive to normally innocuous entities such as dust, pollen, or certain foods.