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Doctor insights on: Elisa Food Allergy Test

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Is food allergy testing accurate?

Is food allergy testing accurate?

Sort of: Food Allergy is diagnosed by taking a thorough history and then confirming the history through skin and/or blood test. Random skin and /or blood test for food allergy in the absence of appropriate clinical history is not very accurate. ...Read more

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Dr. John Chiu
2,695 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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Postive, high, rast test results - only hayfever and animal reactions though? Are rast tests reliable?

Postive, high, rast test results - only hayfever and animal reactions though?  Are rast tests reliable?

RAST vs skin tests: The reason allergists prefer skin tests to rast tests is because the skin tests show your body's biological response to allergens. Rast tests only measure the amount of antibody and do not predict its clinical binding and symptom-provoking abilities. That said, no test is perfect. All have to be compared to your experience and correlated with your history. Allergists spend more time doing this. ...Read more

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Blood or prick test for food intolerance?

Blood or prick test for food intolerance?

Neither: No allergy antibodies in food intolerance. That's what we're looking for with blood and skin testing. So testing can rule-out food allergy in a case of food intolerance. The history and physical examination is usually sufficient to make a diagnosis of food intolerance. If testing is recommended skin testing is much less expensive and perhaps a little more sensitive than blood testing. ...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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Are skin prick tests accurate for food allergies?

Are skin prick tests accurate for food allergies?

Yes, for ruling out: Skin prick testing is used to see if you might be at risk of developing hives or anaphylaxis after eating a food. If a skin test is negative, it is unlikely that food is causing that type of reaction. If it positive, you are at higher risk of having hives or anaphylaxis, but there is a chance that it is falsely positive. ...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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If food allergy prick test is negative (mild redness) and blood rast test negative is it mean you are not allergic to foods?So y get reaction to foods

If food allergy prick test is negative (mild redness) and blood rast test negative is it mean you are not allergic to foods?So y get reaction to foods

Not 100%: If both tests are negative, the chance of being allergic to that food is very very small. However when the history of a food allergy is strong, and the tests were negative, i often ask the patient to bring in the fresh food for the testing instead of relying on commercial food extracts. If the person is still quite concerned over it a challenge test can be done at the office. ...Read more

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Pcr blood test for hsv1 & hsv2 both negative 7 weeks post exposure. Is this a reliable test vs igg antibody testing?

HSV testing: Both are good. A PCR blood test looks for circulating viral DNA. The IgG look for the development of an antibody against the virus. If these are not present 7 weeks after exposure then the most likely conclusion is that you did not acquire it. ...Read more

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Igg allergy test shows moderate allergy to all dairy and eggs. Test prompted by chronic nausea, nothing else. Are these tests reliable?

Igg allergy test shows moderate allergy to all dairy and eggs. Test prompted by chronic nausea, nothing else.  Are these tests reliable?

Food allergy test: Igg tests for food allergies have not been shown in the litterature to have any clinical significance and therefore are not considered reliable. Your symptoms are not allergic in nature, i would look for a gastrointestinal cause. ...Read more

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Erosive gastritis. h.pylori blood test positive, breath test positive, stool antigen test negative, biopsy negative. what to do ?

Erosive gastritis. h.pylori blood test positive, breath test positive, stool antigen test negative, biopsy negative.  what to do ?

Treat it: The positive H. pylori antibody test is not a reliable indicator of current infection. The gold standard for H. pylori treatment is the gastric biopsy, and this is negative in this patient. However, I am impressed by the positive breath test and erosive gastritis. I would have expected stool antigen to be positive, as it mirrors the breath test. Given the discrepant results, treat the patient. ...Read more

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Tested false positive ELISA HIV test last month. Negative ifa and western blot and naat. 2 negative oraquick all 1 1/2 year post exposure. Hiv?

Tested false positive ELISA HIV test last month. Negative ifa and western blot and naat. 2 negative oraquick all 1 1/2 year post exposure. Hiv?

Negative: If nat was negative at 6 months after exposure you not likely to have hiv. Given all the negative test results, you should not worry about the one apparently false positive. ...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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What happens if "h. pylori IgG antibodies serum by ELISA positive"?

H. pylori infection: .. which causes gastritis with symptoms of early satiety, abdominal pain, heartburn. If you are symptomatic, then you will need the treatment. If you are not symptomatic or have responded to treatment already, then your test result indicates ongoing antibody production (normal immune response to previous infection) and no treatment is required. Good luck! ...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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Does ELISA antigen antibody HIV test result negative at 3 months conclusive?

Does ELISA antigen antibody HIV test result negative at 3 months conclusive?

HIV testing: Nope. It is way too soon for this older antibody test to be 100% accurate. If this is the only test you can get then you will need further or repeat testing in twelve weeks. ...Read more

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What is the best food allergy test?

What is the best food allergy test?

Skin Prick Testing: Food allergies are diagnosed first by getting a detailed clinical history of reaction. If history is concerning then skin prick testing and/or serum IgE testing to concerning foods will be drawn. Skin prick testing usually done first followed by serum testing to follow sensitivity over time. Prick to prick testing with actual food is also helpful to help clarify risk. See Allergist for details. ...Read more

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Dr. Heidi Fowler
3,613 doctors shared insights

Nutrition (Definition)

Nutrition is the synergistic combination of nutrients found in food and water that allows the human body to perform all essential ...Read more


Dr. Michael Zacharisen
616 doctors shared insights

Food Allergy (Definition)

An immune system reaction that occurs soon after eating a certain food. This often results in ...Read more