What are 5ASA / 5-aminosalicylate medications Drugs taken to treat INFLAMMATORY BOWEL DISEASE (IBD), an autoimmune disorder that causes mild to severe INFLAMMATION and irritation to the COLON (bowel). People who have IBD typically experience alternating periods of exacerbation and REMISSION; in severe IBD the symptoms are often debilitating. The aminosalicylates, or 5ASAs, appear to work by suppressing the local IMMUNE RESPONSE in the mucosal lining of
Define Active Immunity Long-term, acquired immune protection. Active immunity, also called acquired immunity, results from fighting an INFECTION or receiving a VACCINE that stimulates ANTIBODY response. In many circumstances active immunity is lifelong.
At birth the IMMUNE SYSTEM is fairly undeveloped. The infant relies largely on the carryover of maternal immune components for about the first six weeks of its life, while the infant’s body builds its own immune system. By age four months, maternal IMMUNITY wears off and the infant’s immune system is on its own (though an infant who is BREASTFEEDING continues to receive antibodies and limited immune support from his or her mother). Immunity
What is Allergen and definition Allergen - a harmless substance, also called a hapten, that causes an exaggerated response from the IMMUNE SYSTEM called a HYPERSENSITIVITY REACTION. For reasons researchers do not fully understand, the immune system produces antibodies for the substance that result in the IMMUNE RESPONSE perceiving the substance as a foreign invader. When the allergen contacts or enters the body, the antibodies attack it. Nearly any
What is Allergic Asthma and definition Allergic asthma is a HYPERSENSITIVITY REACTION (allergic reaction) that involves the airways (bronchi). allergic ASTHMA is a type I or IMMUNOGLOBULIN E (IgE) reaction. Mast cells in the bronchial membranes release HISTAMINE, PROSTAGLANDINS, and LEUKOTRIENES. These substances cause itching and swelling of the bronchial membranes, resulting in wheezing and the sensation of chest tightness. Cockroach droppings are the
Allergic conjunctivitis - A type I (IMMUNOGLOBULIN E [IgE]) HYPERSENSITIVITY REACTION, commonly called an allergic reaction, that affects the membranes that line the inner eyelids (conjunctiva). Sometimes the irritation also reddens the white part of the eye (sclera). Allergic CONJUNCTIVITIS features red and swollen conjunctiva with excessive tearing and itching of the eyes and sometimes a white discharge. PHOTOPHOBIA (heightened sensitivity to light) is
A HYPERSENSITIVITY REACTION (allergic reaction) that affects the SKIN, usually in response to contact with an ALLERGEN. As with all hypersensitivity reactions, the first exposure to the allergen produces no symptoms. In reaction to the exposure, however, the IMMUNE SYSTEM produces antibodies for the allergen. Subsequent exposures to the allergen then do produce symptoms. Abundant immune cells reside in the epidermis, the inner layer of skin that contains
What is Allergic Rhinitis and Definition A HYPERSENSITIVITY REACTION to inhaled allergens. Allergic rhinitis, also called seasonal rhinitis or hay FEVER, affects the mucous membranes inside the NOSE (nasal mucosa). Allergic rhinitis affects about 40 million adults in the United States, making it one of the most common hypersensitivity reactions. The condition tends to develop in childhood and continue through adulthood, though some people who have