Allergies
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  Allergies



Allergies

    Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.

RELATED TERMS
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Antigen
A substance which, when present in animal tissue, stimulates the production of antibodies



SIMILAR TERMS
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Allegan General Hospital
Allegan General Hospital is a hospital in Allegan, Michigan (USA).

Allegations, False
The act of deceiving or the fact (or condition) of being deceived.

Alleghany Memorial Hospital
The Alleghany Memorial Hospital is a hospital in Sparta, North Carolina, United States.

Alleghany Regional Hospital
Alleghany Regional Hospital is a hospital in Hopewell, Virginia (USA).

Allegheny General Back Institute
The Allegheny General Back Institute is a hospital in Pittsburgh, Pennsylvania, United States.

Allegheny General Headache Center
The Allegheny General Headache Center is a hospital in Pittsburgh, Pennsylvania, United States.

Allegheny General Hospital
Allegheny General Hospital is a hospital in Pittsburgh, Pennsylvania (USA).

Allegheny General Hospital-Suburban Campus
The Allegheny General Hospital-Suburban Campus is a hospital in Bellevue, Pennsylvania, United States.

Allegheny Neuropsychiatric
The Allegheny Neuropsychiatric is a hospital in Pittsburgh, Pennsylvania, United States.

Allegheny Rheumatology
The Allegheny Rheumatology is a hospital in Pittsburgh, Pennsylvania, United States.

Allegheny University
The Allegheny University is a hospital in Philadelphia, Pennsylvania, United States.

Allegheny University Hospital
The Allegheny University Hospital is a hospital in Philadelphia, Pennsylvania, United States.

Allegheny University Hospitals
The Allegheny University Hospitals is a hospital in Philadelphia, Pennsylvania, United States.

Allegheny Valley Hospital
The Allegheny Valley Hospital is a hospital in Natrona Heights, Pennsylvania, United States.

Allegra
Allegra is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): fexofenadine hydrochloride .

Allegra d 24 hour
Allegra d 24 hour is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): fexofenadine hydrochloride; pseudoephedrine hydrochloride .

Allegra-d 12 hour
Allegra-d 12 hour is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): fexofenadine hydrochloride; pseudoephedrine hydrochloride .

Allele
An alternative form of a gene. One of the different forms of a gene that can exist at a single locus (spot on a chromosome). Also one of the different forms of any segment of a chromosome.

Allele Frequencies
The proportion of one particular allele in the total of all alleles for one genetic locus in a breeding population.

Allelic
Relating to one of a series of two or more alternate forms of a gene that occupy the same position or locus on a specific chromosome.

Allelic exclusion
The ability of heterozygous lymphoid cells to produce only one allelic form of antigen-specific receptor when they have the genetic endowment to produce both. Genes other than those for the specific receptors are usually expressed codominantly.

Allelic Imbalances
A situation where one member (allele) of a gene pair is lost (LOSS OF HETEROZYGOSITY) or amplified.

Allelic Losses
The loss of one allele at a specific locus, caused by a deletion mutation; or loss of a chromosome from a chromosome pair. It is detected when heterozygous markers for a locus appear monomorphic because one of the alleles was deleted. When this occurs at a tumor suppressor gene locus where one of the alleles is already abnormal, it can result in neoplastic transformation.

Allelism Tests
A test used to determine whether or not complementation (compensation in the form of dominance) will occur in a cell with a given mutant phenotype when another mutant genome, encoding the same mutant phenotype, is introduced into that cell.

Allelotropia
A depth percept can cause a shift in perceived form, namely change in the perceived distance between patterns in a configuration. For example that a pattern AB C is viewed in one eye and the pattern A BC is viewed through the other, the letter B is seen in depth at a position halfway between A and C.

Allen Bennett Memorial Hospital
The Allen Bennett Memorial Hospital is a hospital in Greer, South Carolina, United States.

Allen Medical Center
The Allen Medical Center is a hospital in Oberlin Ohio, United States.

Allen Memorial Hospital
The Allen Memorial Hospital is a hospital in Moab, Utah, United States.

Allendale County Hospital
The Allendale County Hospital is a hospital in Fairfax, South Carolina, United States.

Allenmore Hospital
The Allenmore Hospital is a hospital in Tacoma, Washington, United States.

Allentown doctors
All doctors near Allentown, the United States of America. Doctors who can assist a patient in Allentown.

Allentown Osteopathic Medical
The Allentown Osteopathic Medical is a hospital in Allentown, Pennsylvania, United States.

Allentown State Hospital
The Allentown State Hospital is a hospital in Allentown, Pennsylvania, United States.

Allerdryl
A histamine H1 antagonist used as an antiemetic, antitussive, for dermatoses and pruritus, for hypersensitivity reactions, as a hypnotic, an antiparkinson, and as an ingredient in common cold preparations. It has some undesired antimuscarinic and sedative effects.

Allerfed
Allerfed is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): pseudoephedrine hydrochloride; triprolidine hydrochloride .

Allergan 211
An analog of DEOXYURIDINE that inhibits viral DNA synthesis. The drug is used as an antiviral agent.

Allergen
An antigen responsible for producing allergic reactions by inducing IgE formation.

Allergen Challenges, Endobronchial
Tests involving inhalation of allergens (nebulized or in dust form), nebulized pharmacologically active solutions (e.g., histamine, methacholine), or control solutions, followed by assessment of respiratory function. These tests are used in the diagnosis of asthma.

Allergen extract
A fluid containing allergens extracted from natural sources (e.g. trees, grass, cat hair and dander) to a defined standard, quality and quantity. Used in specific allergy vaccination, skin prick tests, provocation tests and in vitro tests.

Allergen Immunotherapy
Immunosuppression by the administration of increasing doses of antigen. Though the exact mechanism is not clear, the therapy results in an increase in serum levels of allergen-specific IMMUNOGLOBULIN G, suppression of specific IgE, and an increase in suppressor T-cell activity.

Allergens
Antigen-type substances that produce immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).

Allergens Radioimmunosorbent Assays
An in vitro allergen radioimmunoassay in which allergens are coupled to an immunosorbent. The coupled allergens bind the IgE in the sera of patients which in turn binds radioisotope-labeled anti-IMMUNOGLOBULIN E antibodies.

Allergic Alveolitis, Extrinsic
Conditions in which inhalation of organic dusts results in hypersensitivity reactions at the alveolar level, associated with the production of precipitins.

Allergic Angiitis
Widespread necrotizing angiitis with granulomas. Pulmonary involvement is frequent. Asthma or other respiratory infection may precede evidence of vasculitis. Eosinophilia and lung involvement differentiate this disease from POLYARTERITIS NODOSA.

Allergic Bronchopulmonary Aspergillosis
Aspergillosis of the lung occurring in an individual with long-standing bronchial asthma. It is characterized by pulmonary infiltrates, eosinophilia, elevated serum IgE and immediate type skin reactivity to aspergillus antigen.

Allergic conjunctivitis
Inflammation of the whites of the eyes (the conjunctivae) with itching and redness of the eyes and tearing, due to allergy.

Allergic Conjunctivitis
Conjunctivitis due to hypersensitivity to various allergens.

Allergic contact dermatitis
A red, itchy, weepy reaction where the skin has come into contact with a substance that the immune system recognizes as foreign, such as poison ivy, poison oak or poison sumac or certain preservatives in creams and lotions. This type of reaction reflects a specific sensitivity or allergy to a specific substance. Also called allergic contact eczema.

Allergic contact eczema
Also called allergic contact dermatitis, this is a red, itchy, weepy reaction where the skin has come into contact with a substance that the immune system recognizes as foreign, such as poison ivy or certain preservatives in creams and lotions.

Allergic Cutaneous Vasculitis
Vasculitis due to allergic reaction, marked by such cutaneous lesions as papules, macules, vesicles, urticarial wheals, purpura, and small ulcers, and accompanied by itching and usually a slight fever and malaise.

Allergic Eczematous Dermatitides
A contact dermatitis due to allergic sensitization to various substances. These substances subsequently produce inflammatory reactions in the skin of those who have acquired hypersensitivity to them as a result of prior exposure.

Allergic granulomatosis
A disease (also often called the Churg-Straus syndrome) characterized by inflammation of the blood vessels in persons with a history of asthma or allergy.The symptoms of the Churg-Strauss syndrome include fatigue, weight loss, inflammation of the nasal passages, numbness, and weakness. The ultimate test for the diagnosis of Churg-Straus syndrome is a biopsy of involved tissue. Treatment of Churg-Strauss syndrome involves stopping inflammation and suppressing the immune system. The Churg-Straus syndrome is named for the American pathologists Jacob Churg and Lotte Straus.

Allergic granulomatous angiitis
See: Churg-Strauss syndrome.

Allergic Neuritis, Experimental
An experimental animal demyelinating disease model of GUILLAINE-BARRE SYNDROME. In the most frequently used protocol, animals are injected with a peripheral nerve tissue protein homogenate. After approximately 2 weeks the animals develop a neuropathy secondary to a T cell-mediated autoimmune response directed towards the MYELIN P2 PROTEIN in peripheral nerves. Pathologic findings include a perivascular accumulation of macrophages and T lymphocytes in the peripheral nervous system, similar to that seen in the Guillaine-Barre syndrome. (From Adams et al., Principles of Neurology, 6th ed, p1314; J Neuroimmunol 1998 Apr 1;84(1):40-52)

Allergic purpura


Allergic Purpura
A form of nonthrombocytopenic purpura due to a hypersensitivity vasculitis associated with a variety of clinical symptoms including urticaria and erythema, arthropathy and arthritis, gastrointestinal symptoms, and renal involvement.

Allergic rhinitis
Allergic rhinitis is a common allergic reaction that causes inflammation of the nose. Symptoms typically include sneezing, congestion, a runny nose, and an itchy nose. Allergic rhinitis may be seasonal or perennial.

Allergic rhinitis, perennial
Allergic rhinitis (hay fever) that occurs throughout the year.

Allergic rhinitis, seasonal
Allergic rhinitis (hay fever) which occurs during a specific season.

Allergic salute
"The person with allergic rhinitis (hay fever) often rubs his/her nose using the index finger. This is the so-called ""allergic salute."""

Allergic vasculitis
A disease (also more commonly called the Churg-Straus syndrome) characterized by inflammation of the blood vessels in persons with a history of asthma or allergy. The symptoms of the Churg-Strauss syndrome include fatigue, weight loss, inflammation of the nasal passages, numbness, and weakness. The ultimate test for the diagnosis of Churg-Straus syndrome is a biopsy of involved tissue. Treatment of Churg-Strauss syndrome involves stopping inflammation and suppressing the immune system. The Churg-Straus syndrome is named for the American pathologists Jacob Churg and Lotte Straus. Vasculitis means inflammation of vessels.

Allergies (Specialty)
A medical specialty concerned with the hypersensitivity of the individual to foreign substances and protection from the resultant infection or disorder.

Allergies, Drug
Immunologically mediated adverse reactions to medicinal substances used legally or illegally.

Allergies, Egg
Allergic reaction to eggs that is triggered by the immune system.

Allergies, Food
Gastrointestinal disturbances, skin eruptions, or shock due to allergic reactions to allergens in food.

Allergies, Peanut
Allergic reaction to peanuts that is triggered by the immune system.

Allergies, Rubber
Allergic reaction to products containing processed natural rubber latex such as rubber gloves, condoms, catheters, dental dams, balloons, and sporting equipment. Both T-cell mediated (HYPERSENSITIVITY, DELAYED) and IgE antibody-mediated (HYPERSENSITIVITY, IMMEDIATE) allergic responses are possible. Delayed hypersensitivity results from exposure to antioxidants present in the rubber; immediate hypersensitivity results from exposure to a latex protein.

Allergies, Tree Nut
Allergic reaction to tree nuts that is triggered by the immune system.

Allergies, Wheat
Allergic reaction to wheat that is triggered by the immune system.

Allerglobuline
The major immunoglobulin in normal human serum.

Allergy
A major defense mounted by the body's immune system against normally harmless substances, or allergens, such as chemicals in pollen, food, bee stings, animal dander, or dust. An allergic reaction is the body's strong reaction to these substances in a person who is sensitive to them. Reactions range from mild to severe, and may include sneezing, a rash, or difficulty breathing (which can be fatal).

Allergy and Infectious Diseases, National Inst.
"One of the U.S. National Institutes of Health (NIH), the mission of the NIAID is ""to support and conduct research and research training (that) strives to understand, treat, and ultimately prevent the myriad infectious, immunologic, and allergic diseases that threaten millions of human lives."" Immunology figures into this statement presumably because it is the common foundation for infectious diseases and allergy."

Allergy desensitization
"Stimulation of the immune system with gradually increasing doses of the substances to which a person is allergic, the aim being to modify or stop the allergy ""war"" (by reducing the strength of the IgE and its effect on the mast cells). This form of treatment is very effective for allergies to pollen, mites, cats, and especially stinging insects (e.g., bees, hornets, yellow jackets, wasps, velvet ants, fire ants). Allergy immunotherapy usually takes 6 months to a year to become effective and injections (""shots"") are usually required for 3-5 years."

Allergy immunotherapy
Stimulation of the immune system with gradually increasing doses of the substances to which a person is allergic. The aim is to modify or stop the allergy by reducing the strength of the IgE response. This form of treatment is very effective for allergies to pollen, mites, animal dander, and especially stinging insects. Allergy immunotherapy usually takes six months to a year to become effective, and injections are usually required for three to five years.

Allergy scratch test
Test done on the skin to identify the allergy substance (the allergen) that is the trigger for an allergic reaction. A small amount of the suspected allergy-provoking substance is placed on the skin. The skin is then gently scratched through the small drop with a special sterile needle. If the skin reddens and, more importantly, if it swells, then the test is read as positive and allergy to that substance is considered probable.

Allergy shots
See Allergy desensitization.

Allergy skin test
Test done on the skin to identify the allergy substance (the allergen) that is triggering the allergic reaction. A small amount of the suspected allergy-provoking substance is placed on the skin. The skin is then gently scratched through the small drop with a special sterile needle. If the skin reddens and, more importantly, if it swells, then the test is read as positive and allergy to that substance is considered probable.

Allergy testing
Tests (often skin tests) to determine a person?s reaction to some foreign substances that are normally harmless, but that produce reaction in some individuals.

Allergy to cockroaches
A condition that manifests as an allergic reaction when one is exposed to tiny particles from cockroaches. Asthma can be due to exposure to cockroach allergens (allergy-provoking substances). These substances are the proteins shed or excreted by the cockroaches.

Allergy, cow milk
"Casein and whey are the two major proteins of human milk and most milk-based formulas. Some (less than 8% of) infants have a true allergy to the cow proteins that are in milk-based formulas. Infants with true cow milk allergy can develop abdominal pain, diarrhea, rectal bleeding, skin rash, and wheezing when given milk- based formulas. These symptoms will disappear as soon milk- based formula is removed from the diet. (Allergy to cow milk protein is different from lactose intolerance). The treatment of cow milk protein allergy involves using formulas that contain no cow milk, or using formulas that contain ""predigested"" casein and whey proteins. The predigesting process breaks the whole proteins into smaller pieces or into amino acids. The amino acids and smaller protein pieces are non-allergenic (do not cause allergy). Soy protein formulas contain no cow milk, and are reasonable alternatives for infants with true cow milk allergy. However, some infants have allergy to both cow milk and soy proteins. These infants require a formula in which the cow milk protein (casein) has been ""predigested"" and specific amino acids added to provide a formula that can provide proper nutrition.

Allergy, honey bee
See: Honey bee allergy.

Allergy, peanut
See: Peanut allergy.

Allerton Virus
A species of SIMPLEXVIRUS causing mammillitis in cattle in Great Britain and South Africa.

Allescheria
Ascomycetous fungi, family Microascaceae, order Microascales, commonly found in the soil. They are causative agents of mycetoma, maduromycosis, and other infections in humans.

Allessandria doctors
All doctors near Allessandria, Italy. Doctors who can assist a patient in Allessandria.

Allethrin
Synthetic analogs of the naturally occuring insecticides cinerin, jasmolin, and pyrethrin. (From Merck Index, 11th ed)



PREVIOUS AND NEXT TERMS
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Amelogenesis
The elaboration of dental enamel by ameloblasts, beginning with its participation in the formation of the dentino-enamel junction to the production of the matrix for the enamel prisms and interprismatic substance.

Ameboma
Infection with any of various amebae. It is an asymptomatic carrier state in most individuals, but diseases ranging from chronic, mild diarrhea to fulminant dysentery may occur.

Amelia
Gross hypo- or aplasia of one or more long bones of one or more limbs. The concept includes amelia, hemimelia, and phocomelia.

Amentia
An acquired organic mental disorder with loss of intellectual abilities of sufficient severity to interfere with social or occupational functioning. The dysfunction is multifaceted and involves memory, behavior, personality, judgment, attention, spatial relations, language, abstract thought, and other executive functions. The intellectual decline is usually progressive, and initially spares the level of consciousness.

Alcoholism
A primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. The disease is often progressive and fatal. It is characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial. Each of these symptoms may be continuous or periodic.

Allergies

Anorexia nervosa
Syndrome in which the primary features include excessive fear of becoming overweight, body image disturbance, significant weight loss, refusal to maintain minimal normal weight, and amenorrhea. This disorder occurs most frequently in adolescent females.

Arteritides
Inflammation of an artery.

Arthrodeses
The surgical fixation of a joint by a procedure designed to accomplish fusion of the joint surfaces by promoting the proliferation of bone cells.

Attention deficit hyperactivity disorder
A behavior disorder originating in childhood in which the essential features are signs of developmentally inappropriate inattention, impulsivity, and hyperactivity. Although most individuals have symptoms of both inattention and hyperactivity-impulsivity, one or the other pattern may be predominant. The disorder is more frequent in males than females. Onset is in childhood. Symptoms often attenuate during late adolescence although a minority experience the full complement of symptoms into mid-adulthood.

Abortion clinic
A medical clinic where pregnancy can be interrupted by medical doctors.

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