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Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.
- What is allergy in biology?
- What is the medical word for allergic reaction?
- What is the pathophysiology of allergies?
- What is allergy in immunology?
- What is a pollen allergy called?
- What are the 4 types of allergic reactions?
- What is immunoglobulin E allergy?
- Which antibody is responsible for allergy?
- Are allergies autoimmune?
- What is the scientific name for hay fever?
- Is pollen a sperm plant?
- What plants are causing allergies right now?
- What are the 10 most common allergies?
- What is type 2 allergic reaction?
What is allergy in biology?
Allergy occurs when a person reacts to substances in the environment that are harmless to most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medications. Atopy is the genetic tendency to develop allergic diseases.
What is the medical word for allergic reaction?
The most severe form is called anaphylaxis or anaphylactic shock. Allergic reactions occur more often in people who have a family history of allergies. Substances that don't bother most people (such as venom from bee stings and certain foods, medicines, and pollens) can trigger allergic reactions in certain people.
What is the pathophysiology of allergies?
Pathophysiology of allergy
Atopy is the predisposition for producing the antibody IgE, which is defined by the presence of one or more positive skin prick tests (SPT) to common aeroallergens (Durham and Church, 2001). Allergy is the clinical expression of atopy - the physical symptoms of allergy related to exposure.
What is allergy in immunology?
Allergies are the result of your immune system's response to a substance. Immune responses can be mild, from coughing and a runny nose, to a life-threatening reaction know as anaphylaxis. A person becomes allergic when their body develops antigens against a substance.
What is a pollen allergy called?
Pollen is one of the most common triggers of seasonal allergies. Many people know pollen allergy as “hay fever.” Experts usually refer to pollen allergy as “seasonal allergic rhinitis.” Each spring, summer and fall, plants release tiny pollen grains to fertilize other plants of the same species.
What are the 4 types of allergic reactions?
Four different types of allergic reactions are immediate, cytotoxic, immune-complex mediated and delayed hypersensitivity reactions. Allergic reactions occur when the body's immune system has a reaction to a substance it sees as harmful, called an allergen.
What is immunoglobulin E allergy?
Immunoglobulin E (IgE) are antibodies produced by the immune system. If you have an allergy, your immune system overreacts to an allergen by producing antibodies called Immunoglobulin E (IgE). These antibodies travel to cells that release chemicals, causing an allergic reaction.
Which antibody is responsible for allergy?
In the majority of cases the antibody typically responsible for an allergic reaction belongs to the IgE isotype and individuals may be referred to as suffering from an IgE-mediated allergic disease, eg, IgE-mediated asthma.
Are allergies autoimmune?
In an autoimmune response, tissue destruction occurs. With allergies, the immune system overreacts to harmless allergens. Interestingly, this is the same type of response that expels viruses, parasites, and bacteria from the body.”
What is the scientific name for hay fever?
Hay fever, also called allergic rhinitis, causes cold-like signs and symptoms, such as a runny nose, itchy eyes, congestion, sneezing and sinus pressure.
Is pollen a sperm plant?
Pollen grains are, in essence, plant sperm. Or perhaps more technically, sperm sedans. Inside, they contain the male portion of DNA needed for plant reproduction.
What plants are causing allergies right now?
Other common weed plants that produce pollen allergens include English plantain, lamb's quarter, pigweed, Russian thistle, yellow dock, sorrel, firebush, cocklebur and marsh elder.
What are the 10 most common allergies?
The 10 most common allergies include foods, animals, pollen, mold, dust mites, medications, latex, insect stings, cockroaches, and perfumes/household chemicals. Allergies are a condition in which the body's immune system considers a substance as a harmful “invader” and overreacts to it.
What is type 2 allergic reaction?
Type II hypersensitivity reaction is a form of immune-mediated reaction in which antibodies are directed against cellular or extracellular matrix antigens. This antibody-mediated response leads to cellular destruction, functional loss, or damage to tissues.
