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Doctor insights on: Test For Allergies

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Does an allergy scratch test test for mold and dust allergies?

Does an allergy scratch test test for mold and dust allergies?

Yes: Skin allergy testing can check for number of allergens. These include environmental and food allergens. ...Read more

Dr. John Chiu
2,651 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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What is an allergy test like to test for pollen allergies?

What is an allergy test like to test for pollen allergies?

Easy: Skin testing for pollen allergy entails: cleaning the skin with alcohol, number the skin to keep track of the different allergens tested, a "prick" with skin test device that has a drop of the allergen on the tip and then waiting 15-20 minutes to see if a reaction occurs. The skin test feels like a mosquito bite it is really quite painless. ...Read more

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Can you test for antibiotic allergies?

Can you test for antibiotic allergies?

Yes.: Yes, however it is somewhat limited. The only fda approved antibiotic that we can skin test for is penicillin. It is tested in small amounts by scratch testing and then small amounts are injected, in increasing doses. Finally if these are negative a small oral dose is given. It is important to test for possible pencillin allergy as this is still an effective, inexpensive antibiotic. ...Read more

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Rast test is for which allergens?

Rast test is for which allergens?

For any and all: The test can be for any of the many allergens. A panel of allergens peculiar to a geographic area is usually employed. ...Read more

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Which allergies would a standard allergy blood test test for?

Which allergies would a standard allergy blood test test for?

Nearly everything: Immunocap ige is the most commonly employed method to test allergy after allergy skin testing. It can be tested to nearly all allergens available. Blood test for allergy is meaningful when strongly positive but has a high false-negative rate when compared to allergy skin testing. The allergens used in the blood testing are often different from those used in allergy skin testing. ...Read more

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Is there a blood test for allergies?

Is there a blood test for allergies?

Yes: Yes, blood can be sent to test for allergies, however the "gold standard" is allergy skin testing. This identifies the important allergens in your area, and also demonstrates that the patient reacts to those allergens. If the skin is so irritated, or you cannot stop taking antihistamines or cannot cooperate with skin testing, blood tests are used as an alternative method. ...Read more

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Are allergy tests for food sensitivites and/or allergies fairly accurate?

Are allergy tests for food sensitivites and/or allergies fairly accurate?

Yes: Allergy testing is fairly accurate for allergies due to ige mediated allergic reactions. Others types of immune and non-immune reactions are not detected by this type of testing. In addition the results of testing need to correlate with (match) the clinical picture and in some instances food and/or drug challenges will need to be dome. See an allergist for evaluation and interpretation of results. ...Read more

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What's more reliable for determining allergies: skin test or blood test?

What's more reliable for determining allergies: skin test or blood test?

Gold standard: This skin test remains the gold standard but these days the blood test has become just about as good. In either case the allergens ordered should be guided by your history and exposures. ...Read more

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I've been "back scratch" tested for allergies. Can the doctors do a allergy tests for specific types?

I've been "back scratch" tested for allergies. Can the doctors do a allergy tests for specific types?

See below: The scratch test does test for specific allergies. Blood work can also be requested for allergies. However, most allergist believe the skin testing is more accurate. ...Read more

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Does allergy testing detect all allergies?

Does allergy testing detect all allergies?

No: Appropriate allergy testing is guided by the patients history and physical examination. Based upon this one's allergist will make a decision what to be tested for. The test, particularly for outdoor allergens is based upon the common allergens is that particular agricultural zone. Does this mean that all allergens will be tested no. ...Read more

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How reliable is a saliva test for allergy?

How reliable is a saliva test for allergy?

Not: There is very little is any data that would support the use of saliva to evaluate one for allergy. ...Read more

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Are allergic tests for cats definitive? Will the test be done for all for major allergens known in cats?

Depends: There are two materials used for cat allergy testing - hair & skin. Both contain the major cat allergen. Cat skin contains other allergens - especially cat Albumin - not present in cat hair - that sometimes cause allergic symptoms. So if you were tested only with cat hair perhaps you could be retested with cat skin (aka cat epidermal or cat dander). ...Read more

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Can bronchoprovocation tests only check for asthma?

Can bronchoprovocation tests only check for asthma?

Depends...: Bronchorovocation tests actually test for bronchospasm which can be present in other diseases besides asthma. Other diseases include some sinus diseases, cystic fibrosis, copd, etc. So, if the test is positive for the presence of bronchospasm, your doctor still needs to consider the whole clinical picture to make the correct diagnosis. ...Read more

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Can bronchoprovocation tests only check for asthma?

Can bronchoprovocation tests only check for asthma?

No : Bronchoprovocation test like a methacholine challenge or mannitol challenge check for bronchial hyper reactivity. However there are only a few diseases that would cause a positive test -- e.g. Asthma, cystic fibrosis, congestive heart failure, allergic rhinitis. Interpreted in the right clinical setting one's doc can figure out the correct diagnosis. ...Read more

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If I have a positive Quest Diagnostics blood test for a food allergy, could a skin test give a stronger confirmation? So many positives for foods!

If I have a positive Quest Diagnostics blood test for a food allergy, could a skin test give a stronger confirmation? So many positives for foods!

Blood tests: for food allergies are somewhat unreliable - as there are many problems with cross reactivities on the assays. Unless you have had a particular event like you were unable to breathe or throat swelling after eating a particular food and are sure there was nothing else causing it- then these results may not be clinically important. Pollen/ and environmental allergy testing is much more reliable. ...Read more

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Is the scratch test for environmental allergies accurate and useful?

Is the scratch test for environmental allergies accurate and useful?

Incredibly: Skin prick testing is the most accurate way to test for environmental allergies. Blood testing is the 2nd most accurate although a far cry from skin testing. All other non-approved forms of testing............Well, i simply state, "let the buyer beware!" there is a reason insurance doesn't cover the non-approved methods... ...Read more

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How accurate is patch testing for allergies?

How accurate is patch testing for allergies?

Pretty good: Patch testing is evaluating contact dermatitis. It is a pretty accurate means to look for specific contactants that cause contact derm. Remember however, not all rashes are contact dermatitis. ...Read more

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Is there an allergy prick test for eczema?

Is there an allergy prick test for eczema?

No: Eczema is diagnosed by examining the patient and taking a history. Allergy prick testing may be helpful in treating eczema, but is not necessary. Allergy testing by skin prick or blood test always needs to be interpreted with careful attention to the patient's history and symptoms. For example some patients may test mildly positive for milk allergy, but can drink milk every day without problem. ...Read more

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What they test for in a drug test for insurance?

What they test for in a drug test for insurance?

Risk of disease: If you are talking about life insurance, they are interested in evidence of risk for early death. Testing for evidence of tabacco use, hiv/aids, elevated lipidis/cholesterol, diabetes and high blood pressure are common. You may still be able to get insurance, but the rates will be higher. ...Read more