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Overview

Immunoglobulin A Test

Immunoglobulin A Test

also known as: igA

Immunoglobulin A is an antibody that plays a crucial role in the immune function of mucous membranes. The amount of IgA produced in association with mucosal membranes is greater than all other types of antibody combined. In general terms, between three and five grams are secreted into the intestinal lumen each day. This represents up to 15% of total immunoglobulins produced throughout the body. An IgA test measures the blood level of immunoglobulin A. Antibodies are proteins made by immune system to fight bacteria, viruses and toxins. It is found in high concentrations in respiratory passages and gastrointestinal tract, as well as saliva and tears. It also plays a role in allergic reactions. IgA levels may be high in autoimmune conditions, disorders in which body mistakenly makes antibodies against healthy tissues.

It is recommended that the test taker or the child wears a T-shirt or a short sleeved shirt that can make it easier for the test to be feasible. No changes are to be observed in the diet routine before taking the test. If, however under any circumstances cautions are to be taken in the diet then the doctor shall inform prior to the tests. Also, the instructions given by the lab are to be duly followed.

An IgA test is done to diagnose the problems with the immune system, intestine and kidneys. It is used to evaluate the autoimmune conditions, such as rheumatoid arthritis, lupus and celiac disease. It may be done in kids who have recurrent infections. Kids born with low levels of IgA- or none at all- are at increased risk of developing an autoimmune condition, infections, asthma, and allergies. This test helps to locate any of the above mentioned conditions.
A health professional will draw the blood from the vein. For an infant, the blood may be obtained by puncturing the heel with a small needle(lancet). If the blood being drawn from a vein, the skin surface is cleaned with antiseptic, and an elastic band is placed around the upper arm to apply pressure and cause the veins to swell with blood. A needle is inserted into a vein and blood is collected in a vial or syringe. Once the blood has been collected, the needle is removed and the area is covered with cotton or bandage to stop bleeding. The blood is saved in a vessel with the name of bearer.
Specimen
plasma or serum
Volume
2ml
Container
3ml light green top tube
Type Gender Age-Group Value
Immunoglobulin A
UNISEX
All age groups
>100kU/l
Rs. 600- Rs1500

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