What are allergen extracts?
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allergen extracts consist of liquid solvents, proteins taken from allergens and other substances such as preservatives. Their use dates back to Britain of the 19th century. Medical experts usually use allergenic extracts for two purposes: allergic tests and immunotherapy. The first is the technique of diagnosis of allergies that the patient may have, while the second is a method of injection treatment. Different varieties of extracts have different medical and logistics advantages and disadvantages.
Charles Harrison Blackley, an English doctor with Hay Fever, invented allergies testing in 1865 when he experimented with grass extracts on the skin. In 1911, John Freeman and Leonard Noon developed a specific immunotherapy of allergen. Like Blackley, two English doctors used extracts of pollen pollen allergens, showing their work that patients could tolerate pollen with greater exposure.E primary allergenic extract manufacturers. The process usually involves the grinding of the material containing aLergen proteins on a finer substance. The addition of liquid solvents pulls out the proteins from the solids to the liquids. The cleaning procedure then creates allergenic extracts that can remain stable at what is considered to be a normal storage temperature of 39.2 ° Fahrenheit (4 ° Celsius).
allergenic extracts come in several forms. Two types of liquid -based extracts are glycerinated and aqueous. Glycerinated species is 50% glycerin and this chemical can help maintain the extract. One of the aqueous species is the lyophilized extract-lyophilized solid, which becomes aqueous with the addition of thinner. The drying process can facilitate transport and storage.
The use of acetone to pull out proteins from allergens creates a liquid extracted as acetone-precise. One acetone extract was precisely standardized for use in the US to test allergies to cats. Studies also showed that another eAcetone Xtrakt has more effectively effectively detecting dog allergies than an extract that was not precipitated by acetone.
The use of aluminum or aluminum aluminum aluminum extract leads to a liquid known as pre -extract extract. This type of extract slowly releases allergens after injection. This is therefore generally excluded from using testing, in which fast results are desirable and reserved for immunotherapy.
allergen extracts used in medical tests usually reflect more common environmental substances known to cause immune reactions. Some of them are pollen, dust mites and animal. Although food allergens tests are available, the number of false positives has caused caution reports from the medical community.
Medical expert performing one kind of allergic test, known as a test of scratches or patches, often begins with the application of allergen extracts on the patient's back. The number of extracts used varies according to teStu and usually ranges from approximately 30 to 120. The doctor leaves the solutions on the patient's back for about 20 minutes and can then check redness or swelling as allergies.
The second type of test is the intradermal method. Between layers of the patient's skin, usually on the forearm, up to about 10 allergen extracts are injected. A patient who is allergic to a tested substance usually develops a blister.
As soon as skin tests have shown an allergy to a particular substance, one may want to undergo allergen specific immunotherapy. Patients who receive immunotherapy also known as allergic shots receive injections of a substance into which they are allergic to increasing doses. Treatment often occurs every week or twice a week. One of the more common diseases of treated allergies specific immunotherapy is asthma.