Allergic rhinitis allergic rhinitis also have asthma, allergic conjunctivitis, or atopic dermatitis. Allergic rhinitis is typically triggered by environmental allergens such as pollen, pet hair, dust, or mold. Inherited genetics and environmental exposures contribute to the development of allergies. Growing up on a farm and having multiple siblings decreases the risk. The underlying mechanism involves IgE antibodies attaching to the allergen and causing the release of inflammatory chemicals such as histamine from mast cells. Diagnosis is usually based on a medical history in combination with a skin prick test or blood tests for allergen-specific IgE antibodies. These tests, however, are sometimes falsely
Allergic transfusion reaction from a donor who has allergies, followed by antigen exposure. An allergic transfusion reaction is a type of transfusion reaction that is defined according to the Center for Disease Control (CDC) as: An allergic transfusion reaction is diagnosed if two or more of the following occur within 4 hours of cessation of transfusion: A probable diagnosis results if any one of the following occurring within 4 hours of cessation of transfusion: Treatment of an allergic transfusion reaction is to immediate stop the transfusion. If the only symptoms are mild (i.e., hives and itching), the patient may be treated with an