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With expert staff, a wide range of allergen tests, modern facilities, and a focus on accuracy and patient care, Allergy Testing Sydney is your top pick for Skin Prick Testing and personalised allergy management. Read more about Dr Richard Baker here.
A skin prick test is used to identify allergies to substances like pollen, mould, pet dander, dust mites, and foods. In this test, a small amount of a suspected allergen is placed on the skin, which is then pricked with a tiny needle. If allergic, a raised bump surrounded by red, itchy skin will develop at the site within about 20 minutes. This helps determine what substances may be causing an allergic reaction.
Skin prick allergy testing is quite accurate, with a sensitivity rate of about 70-90% for detecting specific allergies. However, it can produce false positives, meaning it might indicate an allergy when there isn’t a significant clinical reaction. Results should always be interpreted alongside medical history and possibly confirmed with additional tests.
A skin prick test is usually quick and causes minimal discomfort. The sensation is often described as a brief, minor pricking feeling, similar to a small pinch, which is quite manageable for both adults and children. The test is a straightforward way to pinpoint specific allergies, helping to improve overall health and wellbeing with targeted treatment plans. Most people find the slight discomfort during the test well worth the valuable insights it provides.
A skin prick test introduces small amounts of potential allergens into the skin to check for allergic reactions. During the test, the skin, usually on the forearm or back, is cleaned and several areas are marked to differentiate the allergens being tested. Next, small drops of solutions containing various allergens are placed on these marked areas. The skin under each drop is then gently pricked or scratched with a sterile lancet or needle, allowing the allergen to enter just below the surface. This process is quick and involves minimal discomfort. After the application, you wait about 15-20 minutes to observe the skin’s response. A positive reaction is indicated by a wheal—a raised, round area that looks similar to a mosquito bite—surrounded by redness, which is then measured to assess the severity of the allergy. This test is efficient for detecting immediate allergic responses and helps identify specific substances that might trigger symptoms like sneezing, itching, or skin irritation.
The cost for the appointment which includes consultation with the Doctor and skin prick testing ranges between $300 and $360. Normally, skin prick testing involves testing for up to 15 allergens. However, at Allergy Testing Sydney, we test over 40 allergens on your first appointment. You may also be eligible for Medicare rebates. Patients should verify coverage specifics directly with Medicare or consult our team further to understand the extent of coverage for allergy testing, including any potential out-of-pocket costs.
The skin prick test is a routine test performed by allergists. It involves placing small amounts of allergens onto the skin then with a small lancet a superficial break in the skin is made. The test is monitored for 15 minutes and observed for any signs of a wheal or flare reaction. The skin prick test is low risk and delivers quick results for the doctor to gain an indication of each patient’s sensitivity.
After an initial consultation, Dr Baker determines which allergens to test. The test will span over 40 allergens on your first appointment, with foods and inhalants extensively tested at no extra cost.
Dr Baker’s preferred method of treatment is immunotherapy with a sublingual vaccine that is made on the premises and prescribed specifically for each patient. The treatment costs less than $1 a day and targets the allergens causing the patients sensitivity through a desensitising process.In order for the vaccine to be prescribed Dr Baker performs a second set of tests involving intradermal testing using very weak dilutions of the specific allergen in order in order to determine a safe and effective starting dose for each patient.
The test involves injecting small amounts of diluted allergen extracts just under the skin. After waiting ten minutes, the skin is examined for a reaction. This procedure can be repeated using two to three dilutions of the same extracts, getting subsequently stronger or weaker each time. Once the patients skin reacts positively to a particular allergen(s), the test is complete and a vaccine can be made to desensitise against the allergens causing the patient problems.
This test is performed in cases of contact dermatitis (Eczema) or any other allergy is suspected. The allergens are prepared in appropriate concentrations in white soft paraffin (e.g. Vaseline) and are then spread on to discs, 1 cm diameter. The discs (which are made of a special metal, cannot themselves provoke a reaction) are placed on the skin, usually on the back, and are kept in place by hypoallergenic tape. The skin is coded appropriately and the patient is asked to keep the skin dry. The patches are left in place for 48 hours.
After 48 hours the discs are removed, the skin is examined and any redness or swellings are noted. The skin is re-examined after a further 48 hours for any remaining local redness or swelling. The interpretation of this form of testing is not as simple as it sounds and tends to be carried out by a doctor. The symptoms of contact dermatitis need to be brought under control before patch testing can be carried out, otherwise the results will be unreliable. Steroid creams need to be stopped for 3-4 weeks before testing as they may suppress the test response. Any professional interpreting skin, blood or patch tests must first interpret the results in the light of the patient’s history. No test should be read in isolation.
Despite continuing advances in the diagnosis of immunoglobulin E (IgE) mediated inhalant and food allergy utilizing in vitro technology, the otolaryngic allergist should be familiar with the principles and practise of skin endpoint titration (SET). Skin testing techniques and responses will allow proper interpretation of in vitro-based antigen vial tests, will permit the blending of in vitro and in vivo test methods within the allergy practice, and will often give a clearer picture when a practitioner is caught in a confusing situation. Preparing to do a skin Endpoint Titration Test is time consuming and labour intensive requiring a trained scientific officer or doctor to perform the tests. A immunotherapy dosage for either injection or sub-lingual vaccine can be better determined using this method.
Visit us L7 William Bland Centre 229 Macquarie Street Sydney, NSW, 2000
Call us on (02) 9221 1511
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(02) 9221 1511
Vaccine Sublingual Immunotherapy
Patch Test
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