A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma
{i} excessive sensitivity to certain substances (i.e. animal hair or pollen) which often causes the development of respiratory problems or other symptoms
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)
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
hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity
an exaggerated or inappropriate immune response initiated by exposures to antigens such as mold spores, pollen, or certain drugs and foods
(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
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
a damaging immune system response to a substance to which a person has become hypersensitive
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
An inappropriate and harmful response of the immune system to normally harmless substances (Read about "Allergies")
Adverse overreaction, of the body's self-defence system caused by the production of antibodies against specific substances Asthma and hayfever and intolerance to milk or egg are familiar examples of allergies
exaggerated reaction (sneezing, runny nose, itching, skin rash, difficulty in breathing) to substances that do not affect other individuals
An inappropriate response by the immune system to a normally harmless substance It can affect any type of body tissue
hypersensitivity to substances which are foreign to the body Such substances can include pollens, foods, dust, microorganisms and so forth
Hypersensitivity to a particular substance (chemical, cosmetic, dust, drug, feather, food, pollen) that causes characteristic symptoms when encountered, ingested, or inhaled
A condition in which the body has an exaggerated (immune) response to a substance, like a vaccine Also known as hypersensitivity
If you have a particular allergy, you become ill or get a rash when you eat, smell, or touch something that does not normally make people ill. Food allergies can result in an enormous variety of different symptoms. allergies a medical condition in which you become ill or in which your skin becomes red and painful because you have eaten or touched a particular substance allergy to. Exaggerated reaction by the body to foreign substances that are harmless to most people. Those substances, called allergens or antigens, may include pollens, drugs, dusts, foods, and other items. Immediate allergic reactions result from genetic predisposition or sensitization by previous exposure. Blood vessels dilate and bronchial air passages constrict. A severe reaction (anaphylaxis) can obstruct breathing and may be fatal. Delayed allergic responses (e.g., contact dermatitis) appear 12 hours or more after exposure. Avoiding allergens and taking antihistamines can prevent or treat allergies. When avoidance is not feasible and antihistamines do not relieve symptoms, desensitization can be attempted
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
A condition of hypersensitivity to a substance (an allergen) considered harmless to most people. Exposure (consumption, inhalation, physical contact, etc) to such substances causes the body to undergo a reaction, often resulting in symptoms such as difficulty breathing and/or swellings/rashes of the skin
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
The body's exaggerated reaction to a foreign substance that is harmless to most people For a reaction to be considered an allergic reaction, it must involve the immune system The foreign substance may be eaten, inhaled or injected
An exaggerated response to a substance or condition produced by the release of histamine or histamine-like substances in affected cells
an acquired, abnormal immune response to a substance that can cause a broad range of inflammatory reactions
1 negative reaction to something 2 something foreign that is affecting our beliefs, 3 reaction to stress, physical problems, or people in general
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 See sensitisation
A state of immunologically mediated hypersensitivity to a foreign material that is inhaled, ingested, or touched
An inappropriate and harmful response of the immune system to normally harmless substances
[ 'a-l&r-jE ] (noun.) 1910. From German Allergie. Coined by Austrian pediatrician Clemens von Pirquet in 1906 from Ancient Greek ἄλλος (allos, “other”) + ἔργον (ergon, “work, activity”), on the model of Energie.