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Doctor insights on: Allergic Reaction To Mantoux Test

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What is the result of mantoux test if it shows induration is 18mm and it is red?

What is the result of mantoux test if it shows induration is 18mm and it is red?

Exposure to TB: What you have described meets the criteria for a positive mantoux test result. A positive result means that the person has been exposed to tuberculosis. It does not mean that the person has tb, just that at one time the person was infected with the TB microorganism. ...Read more

Dr. John Chiu
2,638 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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How can I recognise mantoux test result is negative?

How can I recognise mantoux test result is negative?

No induration: If you run your finger, gently, over the site of the injection and do not feel any hardness like a grain under the skin, it is negative, However, it is not a good idea to be one's own doctor and you should go back to your doctor 48 hours placing of the test, so that s/he may read it professionally. ...Read more

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What is the result of mantoux test if it shows induration : 18mm and erythema : present?

Positive: If you do not have active symptoms of tuberculosis and have not received bcg in the past year, then it is likely you have inactive tuberculosis. This means that you have living mycobacterium tuberculosis in your body, contained within a granuloma and potentially could reactivate at some later time. Depending on your age and health you may want to take inh. See a doctor. ...Read more

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My mantoux test result is "erythema & induration present diameter 10 mm. What is the interpretation?

Exposure to TB: What you have described meets the criteria for a positive mantoux test result. A positive result means that the person has been exposed to tuberculosis. It does not mean that the person has tb, just that at one time the person was infected with the TB microorganism. ...Read more

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Is bleeding supposed to occur during a mantoux test?

Is bleeding supposed to occur during a mantoux test?

Not usually: You are supposed to inject as small amount (0.1 ml.) of the material into the very upper layer (epidermis) of the skin. There are a few capillaries there so there might be a tiny bit of blood but not usually. ...Read more

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Mantoux test positive?

Mantoux test positive?

Work up needed: At the very least it may suggest that you have been exposed to tuberculosis. You should visit with your doctor to have questions asked about whether or not you have TB symptoms to suggest infection such as do you have a cough? Unexplained night sweats? Unexplained weight loss, fevers or chills and fatigue? You also need to have a chest x ray performed - since organism is usually inhaled. ...Read more

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How to take mantoux test?

How to take mantoux test?

TB test: This is a test for tuberculosis. It is a skin test placed by a medical professional. ...Read more

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Procedure of mantoux test?

Procedure of mantoux test?

Wheal: The tuberculin skin test is administered to the upper third of the forearm (palm up) ≥2 inches from elbow, wrist, or other injection site. If neither arm can be used, it can be given in the back of the shoulder. Use a 1/4 to1/2 inch 27-gauge needle or finer tuberculin syringe. It should form a wheal 6-10 mm in diameter, and it is interpreted 48-72 hours later. ...Read more

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What is the purpose of the mantoux test?

What is the purpose of the mantoux test?

Tuberculosis test: It is done to see if you have ever been exposed to TB. ...Read more

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After a full - course of treatment for TB infection, how long will it take for mantoux test to read normal?

After a full - course of treatment for TB infection, how long will it take for mantoux test to read normal?

Will Always be (+): Once you have had a positive test it will remain (+) forever, even successfully treated. That is why you never need to or should repeat it. You just have to inform whomever is requiring the test that you are a "Tuberculin Reactor." This does not mean you have active TB. ...Read more

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Suffering from cough and fever fatigue since two weeks, Mantoux test was negative sputum AFBwas negative?

Suffering from cough and fever fatigue since two weeks, Mantoux test was negative sputum AFBwas negative?

Mgt: There are many causes of prolonged cough. If you a fever, chills, infection should be considered and treated accordingly.
If your cough is dry, asthma, allergies, should be evaluated.
If you have smoke exposure, discontinue please. A check up with your PCP is indicated. ...Read more

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My doc refused to do urinary PCR to check for scrotal tb, he insists mantoux test is accurate enough. Is mantoux test reaaly that sensitive?

My doc refused to do urinary PCR to check for scrotal tb, he insists mantoux test is accurate enough. Is mantoux test reaaly that sensitive?

Why?: Like me, your doctor probably wonders why on earth you think you have scrotal tb. A mantoux test is a good test for determining whether you harbor the TB bacillus. If it's negative, you should probably look for another explanation for whatever is bothering your scrotum. ...Read more

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What are the tests for allergic reaction to insect bites?

What are the tests for allergic reaction to insect bites?

Skin test or blood: When you see an allergist, they will first take a detailed history of your symptoms from the bite. And the type of insect involved, if known...Depending on the insect, a series of simple scratch tests can be done, or sometimes a blood testis done first. It depends on your reaction history. ...Read more

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What can be done in advance of an MRI to ensure the contrast does not cause an allergic reaction? Is there any way to be extra cautious or do a test?

What can be done in advance of an MRI to ensure the contrast does not cause an allergic reaction? Is there any way to be extra cautious or do a test?

MRI = very safe: No need to do anything in advance. The incidence of true reaction to MRI contrast is on the order of 1 in 10, 000 or less. If your kidney function is decreased for any reason, the radiologist may choose not to give contrast to prevent a rare complication called nsf, but it has nothing to do with allergy. ...Read more

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What about allergic reaction from the test (tubersol?

What about allergic reaction from the test (tubersol?

None: There is no allergic reaction to the tubersol (tb mantoux) test.
If there is a swelling and redness around the site of the test, it may mean that the test is positive and this has to be confirmed by your doctor who will determine what step needs to be taken next. ...Read more

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Getting a skin test by the allergens given get you the allergic reaction a get you feeling bad?

Getting a skin test by the allergens given get you the allergic reaction a get you feeling bad?

Rarely: Delayed reactions after skin testing are rare. But when they occur, and they are progressing slowly and are relatively mild, then cetirizine or even Benadryl (diphenhydramine) (by pill or topically to the skin testing site) should help. ...Read more

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If you have a severe allergic reaction to contrast can you still have a pet scan? And also if you have diabetes can you have this test?

If you have a severe allergic reaction to contrast can you still have a pet scan? And also if you have diabetes can you have this test?

Yes; different chem: Typically pet scan uses a small amount of radioactive material which tends to accumulate in higher amount in more active tissues such as tumor or site of infection, thus better seen on scan. Ct contrast uses a radioopaque substance that is different than one for pet, thus you should be fine. Make sure your diabetes/sugar is under good control. Consult doc and best of luck to you. ...Read more

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Can you develop an allergic reaction from eating certain type of food within 3 days of eating it even if the skin prick patch test is negative for that food?

Can you develop an allergic reaction from eating certain type of food within 3 days of eating it even if the skin prick patch test is negative for that food?

Details matter: What do you mean by "allergic reaction"? Food allergies proceed through igE and manifest as URTICARIA, mostly HIVES. If you have a rash or eczema it is not due to food. Skin tests of any kind are notoriously unreliable for food allergies. Why were these tests done? They are usually useless and should never be done if the patient has eczema. ...Read more

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Is it an allergic reaction from the test (tubersol) if you have some swelling?

Is it an allergic reaction from the test (tubersol) if you have some swelling?

Show your doctor: Swelling, redness, tenderness, heat, and even bruising are the signs of a positive reaction to the tuberculin protein present in tubersol. This is not an allergy but a hypersensitivity reaction. Both involve the immune system activity. In this case the positive reaction indicates previous exposure to tuberculosis either through infection or by vaccination with BCG (bacillus calmette-guerin). ...Read more

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Might it be possible that a a person have an allergic reaction to the PPD test for tb?

Might it be possible that a a person have an allergic reaction to the PPD test for tb?

Ppd testing: If you are given a TB test, a small amount of the TB bacterial protein is injected into the top layer of the skin. If you have had a prior TB exposure, your immune system would typically have made an immune response and you would see this response in the skin by a raised red reaction at the injection site. Interpretation of this reaction requires an experienced physician for grading. ...Read more

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Should you induce allergic reaction for tryptase blood test? I read sample timing matters?

Should you induce allergic reaction for tryptase blood test? I read sample timing matters?

Timing matters: In anaphylaxis, the tryptase level should be obtained no more than 2 hrs after the reaction occurs. However anaphylaxis to food often does not cause elevated tryptase level. Why would you want to trigger an allergic action to get a positive result since not all anaphylaxis lead to elevated tryptase level? ...Read more

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My feet tends to get swollen, I had numerous tests done and it showed nothing. Could this be an allergic reaction to something?

My feet tends to get swollen, I had numerous tests done and it showed nothing. Could this be an allergic reaction to something?

Maybe: Swelling of the feet can be from allergies, although usually, it is not limited to the feet only. Allergic swelling usually occurs in the feet, hands, lips, and around the eyes. You should see an allergist to help you sort this out. Other causes of swelling in the feet can be long hours standing, venous inusufficiency in the legs, or varicose veins. ...Read more

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3/05/15 I got a prick test and I got 2+ (4- 8mm) of allergic reaction to peanut what would happen if I consume alot? Besides rash or comen reaction.

3/05/15 I got a prick test and I got 2+ (4- 8mm) of allergic reaction to peanut what would happen if I consume alot? Besides rash or comen reaction.

Avoid: Have you ever had a reaction to peanut? If not why were you tested? With peanut allergy anaphylaxis can occur and the severity can not be predicated by the size of the skin test or the type of reaction you had in the past. Even the tiniest amount can cause a severe reaction. Consult your allergist regarding an epinephrine autoinjector. ...Read more

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What happens if you have allergic reaction to TB skin test does it mean that you have tb?

Was it allergic?: Was the reaction an allergic reaction or was it a positive sin test? There are components in the test that one can react to in an allergic fashion...The area can be red and itchy. But if it is raised and red and approx the size of a dime, it is a positive test and means you have been exposed to tb. ...Read more

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My 4 month old baby has an allergic reaction to milk formula and has switched to soy without problems. When should he have an allergy test?

My 4 month old baby has an allergic reaction to milk formula and has switched to soy without problems. When should he have an allergy test?

No rush if soy OK: Was the reaction skin, respiratory or gastrointestinal (gi)? Was there blood in the feces? If symptoms were completely GI & associated with pallor or floppiness think enterocolitis. This non-ige mediated milk allergy reaction may persist for several years. Only valid test is oral challenge carefully performed by an experienced allergist. For skin & respiratory symptoms skin or blood test at 1 year. ...Read more

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I ate nuts. I feel like crystals forming multifocally under my skin which hurts, thigh, neck and hands etc. How can you test this allergic reaction?

I ate nuts. I feel like crystals forming multifocally under my skin which hurts, thigh, neck and hands etc. How can you test this allergic reaction?

Allergic..: Reactions to nuts can cause skin swelling, redness, itching, and soreness. See an allergist to be tested for this. Avoid nuts until you are tested. Good luck! ...Read more

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Today dental patch test revealed a extreme allergic reaction to carvone. What sort of tooth paste and mouthwash can I use now? Can find zero results

Today dental patch test revealed a extreme allergic reaction to carvone. What sort of tooth paste and mouthwash can I use now? Can find zero results

More tests needed: Found naturally in caraway seed, dill, mandarin orange peel and spearmint leaves, carvone and its derivatives are used in a variety of different commercial applications. I would want to know about your sensitivity to the natural compound versus the synthetic laboratory-made. I would recommend further testing with an allergist. Baking soda as toothpaste with water rinse...Can you eat mint leaves? ...Read more

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Allergic reaction 1 week ago where r side of lip swelled. Now swelling mostly gone but pulsating bump under lip there? Have scheduled allergy test.

Allergic reaction 1 week ago where r side of lip swelled. Now swelling mostly gone but pulsating bump under lip there? Have scheduled allergy test.

Lip swelling: A pulsating bump in the lip does not sound like a residual from an allergic reaction. If you can get into seeing your doctor first before seeing the alllergist, they may look at it and see what it is. ...Read more

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How can I treat an allergic reaction?

How can I treat an allergic reaction?

Benadryl (diphenhydramine): Immediately stop eating the food you think is causing the problem. Take liquid or dissolving Diphenhydramine (benadryl). If your reaction is worse: cough, shortness of breath, wheezing, chest tightness, difficulty breathing, hives all over your body, swelling of lips and tongue, etc., then you need to use your Epinephrine autoinjector (epipen, twinject) and go to the nearest emergency room. ...Read more

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What to do about an allergic reaction?

Call your doctor: For mild symptoms I would call your doctor. If there symptoms are severe such as trouble breathing, throat closing, feeling faint you should call 911 and go to the emergency room. ...Read more

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Could I get the same allergic reaction?

Could I get the same allergic reaction?

Yes.: The nature of allergy is that repeat exposure results in repeat, and often more exaggerated, response. There is always the question of whether the initial reaction was true allergy or something else like irritant response or drug side effect. Another important aspect of allergy is "cross-reactivity", which occurs when similarly structured molecules (eg drugs in the same family) are recognized. ...Read more

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How do I figure out my allergic reaction?

How do I figure out my allergic reaction?

Allergic reaction: Allergic reactions can be quite varied. A visit to the allergist can help determine what is triggering your reaction and the best way to manage it. ...Read more

Dr. John Chiu
1,044 Doctors shared insights

Allergic Reaction (Definition)

Sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more