PATHOLOGY

Detailed explanation-1: -When a harmless substance such as dust, mold, or pollen is encountered by a person who is allergic to that substance, the immune system may over react by producing antibodies that “attack” the allergen. The can cause wheezing, itching, runny nose, watery or itchy eyes, and other symptoms.

Detailed explanation-2: -Common allergic reactions, such as hay fever, certain types of asthma, and hives are linked to an antibody made by the body called immunoglobulin E (IgE). Each IgE antibody can be very specific. This means it reacts to certain pollens and other allergens.

Detailed explanation-3: -The immune system reaction Allergy is the result of mistaken identity. An allergen enters the body and is wrongly identified by the immune system as a dangerous substance. In response, the immune system makes antibodies to attack the allergen. These are specific antibodies of the IgE (immunoglobulin E) class.

Detailed explanation-4: -Anaphylaxis is the result of your body’s immune system overreacting to a harmless substance, such as food. Substances that trigger allergic reactions are known as allergens. Anaphylaxis usually develops within minutes of contact with an allergen, but sometimes the reaction can happen up to 4 hours later.