What is an allergic reaction
Home
Patient Welcome Center
Providers
Allergens
Contact Us
     
  Patient Newsletter  
  Patient History Form  
  Patient Information Form  
  Patient Consent Form  
     
  Dilley Allergy & Asthma Specialists, LLP
7835 W. Interstate 10
San Antonio, Texas 78230
Phone: 210.614.4405
Fax: 210.614.7892
 
 
 

What is an allergic reaction? In San Antonio Texas call 210-614-4405

 
     
 

Normally, the immune system functions as the body's defense against invading germs such as bacteria and viruses. In most allergic reactions, however, the immune system is responding to a false alarm. When an allergic person first comes into contact with an allergen, the immune system treats the allergen as an invader and gets ready to attack.

The immune system does this by generating large amounts of a type of antibody called immunoglobulin E, or IgE. Each IgE antibody is specific for one particular substance. In the case of pollen allergy, each antibody is specific for one type of pollen. For example, the immune system may produce one type of antibody to react against oak pollen and another against ragweed pollen. The IgE molecules are special because IgE is the only type of antibody that attaches tightly to the body's mast cells, which are tissue cells, and to basophils, which are blood cells. When the allergen next encounters its specific IgE, it attaches to the antibody like a key fitting into a lock. This action signals the cell to which the IgE is attached to release (and, in some cases, to produce) powerful chemicals like histamine, which cause inflammation. These chemicals act on tissues in various parts of the body, such as the respiratory system, and cause the symptoms of allergy.





Courtesy: National Institute of Allergy and Infectious Diseases


     San Antonio, Texas

  Introduction to Allergies
  What is an allergy?
  What is allergic rhinitis? (Hay Fever)
  Why are some people allergic?
  What is an allergic reaction?
  Allergy Symptoms
  Pollen Allergy
  Mold Allergy
  Animal Allergy
  Dust Allergies
  What Is Food Allergy?


  Introduction to Asthma
  Contact Dermatitis
  What are Hives?
  Latex Allergies






 
Allergists      .      Patient Welcome Letter      .      Providers      .      Allergens      .      Contact Us      .      Privacy Policy      .      Terms and Conditions
 
   
Copyright © - Dilley Allergy & Asthma Specialists, LLP - All rights reserved