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  • New nasal smear test...

New nasal smear test for allergic rhinitis developed by researchers

Written By : Dr. Kamal Kant Kohli Published On 2020-04-19T20:15:24+05:30  |  Updated On 20 April 2020 10:32 AM IST
New nasal smear test for allergic rhinitis developed by researchers
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Researchers at Institute of Environmental Medicine at the Helmholtz Zentrum München have developed a new a more acceptable approach - nasal smear test for allergic rhinitis.The new research has appeared in the journal Allergy.

World over million of patients of allergy are typically been diagnosed using blood samples or skin prick tests. The latter method is often seen as particularly uncomfortable because the skin is exposed to various allergens and punctured with a fine needle. Many patients - especially children - even find the blood test quite unpleasant.

Claudia Traidl-Hoffmann, a professor of environmental medicine at TUM and the director of the Institute of Environmental Medicine at the Helmholtz Zentrum München, has now tested a new diagnostic method for allergic rhinitis with her team. The scientists studied nasal smears using a method originally developed for blood samples: With a recent development in biochip technology, practitioners have been able for some time now to measure antibody concentrations for 112 different allergens with a single small blood sample.

Prof. Traidl-Hoffmann's team used this molecular diagnostics technology to measure concentrations of immunoglobulin E (IgE) antibodies in the blood and nasal secretions of test subjects. These antibodies play a role in certain allergic responses. The researchers studied individuals with and without sensitization to the most common airborne allergens, including dust mite castings, grass pollen and the pollen of birch, hazelnut and alder trees.

Results for a range of allergens

For the same tests, the blood and nasal smears yielded similar results: They detected identical allergic sensitization patterns, i.e. the same sets of substances for which the body had developed an immune response. This was the case for all airborne allergens investigated. Previous studies had already demonstrated a link between the detection of allergy antibodies in the blood and in nasal secretions for certain aeroallergens. The researchers have now confirmed this correlation for a wide range of such allergens.

"A big advantage of allergy diagnostics with a nasal smear is that it is a good option for small children as compared to blood samples or skin prick testing. For that age group, a hyposensitization therapy is important because allergic rhinitis can develop into allergic asthma," says Prof. Claudia Traidl-Hoffmann. PD Dr. Stefanie Gilles adds: "We also believe that, with nasal smears, IgE antibodies specific to certain allergies can be detected that cannot be measured in a blood sample. We now need to do further studies to explore that hypothesis."

For further reference log on to:

http://dx.doi.org/10.1111/all.14228

Source : journal Allergy
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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