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Allergens are the substances that cause allergic Reactions

Introduction Allergens are the substances that cause allergic reactions such as certain foods dust plant pollen or medicines An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off against perceived threat that would otherwise be harmless to the body In attempt to protect the body the immune system produces IgE antibodies mediated response to that allergen Those antibodies then cause certain cells in the body to release chemicals into the bloodstream such as histamine The histamine then acts on a person's eyes nose throat lungs skin or gastrointestinal tract and causes the symptoms of the allergic reaction Several factors affect allergens In this study some studies were conducted on herd to as allergen Farrokhi S Mousavi T Arshi S Varasteh A Rezaei N Salekmoghadam A Co Administration of Chenopodium Album Allergens and CpG Oligodeoxynucleotides Effects on Peripheral Blood Mononuclear Cells of Patients with Allergic Rhinitis Treated with Intranasal Corticosteroids and Antihistamines Iran J Allergy Asthma Immunol 2011 10 2 101 110 Chenopodium album is a fast growing weedy annual plant in the genus Chenopodium and its pollen act as allergen This study imbibe the preparation of pollen extract purification of antigen immunization production of antisera and the testing of antisera against allergy Amjad L Comparative Study of Pollen Extracts Allergenicity of Chenopodium album L and Chenopodium Botrys L an in vivo 

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