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Allergy Tests & Vaccine Treatments

Allergy Tests & Vaccine Treatments

Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling. Food intolerances and food poisoning are separate conditions.

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.

Allergy

Symptoms:

Hives are a common allergic symptom

  • Red eyes
  • itchy rash
  • runny nose
  • shortness of breath
  • swelling
  • sneezing

Types:

  • Hay fever
  • food allergies
  • atopic dermatitis
  • allergic asthma
  • anaphylaxis

Causes:

  • Genetic and environmental factors
  • Diagnostic method
  • Based on symptoms, skin prick test, blood test
  • Differential diagnosis
  • Food intolerances, food poisoning

Prevention:

  • Early exposure to potential allergens

Treatment:

  • Avoiding known allergens
  • medications
  • allergen immunotherapy

Medication:

  • Steroids
  • antihistamines
  • epinephrine
  • mast cell stabilizers
  • antileukotrienes

Frequency

Common allergens include pollen and certain foods. Metals and other substances may also cause problems. Food, insect stings, and medications are common causes of severe reactions.Their development is due to both genetic and environmental factors. The underlying mechanism involves immunoglobulin E antibodies (IgE), part of the body's immune system, binding to an allergen and then to a receptor on mast cells or basophils where it triggers the release of inflammatory chemicals such as histamine.

Diagnosis is typically based on a person's medical history. Further testing of the skin or blood may be useful in certain cases. Positive tests, however, may not mean there is a significant allergy to the substance in question

Early exposure to potential allergens may be protective. Treatments for allergies include the avoidance of known allergens and the use of medications such as steroids and antihistamines. In severe reactions injectable adrenaline (epinephrine) is recommended.Allergen immunotherapy, which gradually exposes people to larger and larger amounts of allergen, is useful for some types of allergies such as hay fever and reactions to insect bites.Its use in food allergies is unclear.

Allergies are common.In the developed world, about 20% of people are affected by allergic rhinitis,about 6% of people have at least one food allergy,and about 20% have atopic dermatitis at some point in time.Depending on the country about 1–18% of people have asthma.Anaphylaxis occurs in between 0.05–2% of people. Rates of many allergic diseases appear to be increasing.The word "allergy" was first used by Clemens von Pirquet in 1906.

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