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Doctor insights on: Tb Test Allergic Reaction Symptoms

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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

Dr. Scott Lindquist
613 Doctors shared insights

Mycobacterium Tuberculosis Infection (Definition)

Mycobacterium tuberculosis is an infectious organism that spreads by droplets coughed out by an infected person. Infection is established initially in lungs, but can spread within lungs & to other body parts, or can become latent, with reactivation occurring years to decades later. With effective treatment, it can be completely eliminated although drug resistant ...Read more


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

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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If you were going to have a bad reaction (not a positive reaction) to a TB test (under the skin) would it happen right away or can it take days?

If you were going to have a bad reaction (not a positive reaction) to a TB test (under the skin) would it happen right away or can it take days?

1 to 3 days: It can take 1 to 3 days to get to its worst. This is for some people that have reactions after they have a positive test. If you are referring to a type of allergic reaction, this usually be almost right away. ...Read more

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What do you suggest if my friend is worried about her reaction to PPD (tb) test?

What do you suggest if my friend is worried about her reaction to PPD (tb) test?

May need a: Chest xray. There is a blood test called Gold's Quanitferon test your friend could do at a hospital or clinic. ...Read more

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My friend is worried about her reaction to PPD (tb) test. Should she be concerned?

My friend is worried about her reaction to PPD (tb) test. Should she be concerned?

Too general: A question to be helpful. Is she concerned about induration that is palpable? An area of redness? Has she been in close contact wtih someone who has active tuberculosis? Does she have symptoms consistent with TB? I think that PPD tests are very important. TB has become a real problem in the US. ...Read more

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How long is TB test takes and what is the symptoms and causes of tb.

How long is TB test takes and what is the symptoms and causes of tb.

What test was done?: Skin test takes 48 hours and needs to be interpreted by a qualified professional, i.e.; whoever placed the test. Blood draws can give the answer in 1-2 days and may be indicative of past infections. Tb is an infection caused by a bacteria. It requires multiple antibiotics for months to eradicate. If there is an active infection of the lungs, it can be highly contagious. Symptoms are variable. ...Read more

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Is it possible to be allergic to the TB test?

Is it possible to be allergic to the TB test?

Distinctly unusual: Anything is possible but allergy to the TB test would be distinctly unusual. ...Read more

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What do positive TB test results mean? How should I interpret the positive result of a TB test?

Infection with Tb: When someone is infected with tuberculosis (TB) germs, the body develops a protective response against them. The TB skin test is a test of the body's response to tb, not the germs themselves. One can have an active infection where they are coughing out TB germs and are a risk to spread tb. Or the body may have had the infection long ago and controlled it so there is no risk now of spread. ...Read more

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Positive test result for TB my husband got a job offer and had to get a TB test. He went back to get the results and the spot is slightly red and barely over 10 mm. He is convinced that the results are positive and as a result he won't get the job. The

Positive test result for TB my husband got a job offer and had to get a TB test. He went back to get the results and the spot is slightly red and barely over 10 mm. He is convinced that the results are positive and as a result he won't get the job. The

Hello.: Hello. You can have an overlying are of redness, that doesn't mean the test is positive. I always used the ball point pen method to read the TB test. You gently move the pen back and forth to determine where there is underlying induration. Being PPD positive and having tuberculosis are two very different things. Please have him talk to the person who administered the test to find out the result. You are checking for inducation and not color. Take care. ...Read more

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My TB (tuberculosis) test is positive, but I don't feel any symptoms. Why?

My TB (tuberculosis) test is positive, but I don't feel any symptoms. Why?

Chest X ray: It is possible to have active TB with very little symptoms especially early on. However, it is more than likely that you carry the germ for TB in a dormant form, this is called latent tb. No symptoms are expected with latent tb. ...Read more

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Please tell me what a normal result after a TB test (tuberculosis) looks like?

TB: Tuberculin Tine Test- is smooth to moderately deep palpation. What is important is what it feels like - not what it looks like. ...Read more

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21 yr-old had 8 months of upper respiratory and urinary symptoms, felt caused by infections, and may have immune system disorder on test results.....?

21 yr-old had 8 months of upper respiratory and urinary symptoms, felt caused by infections, and may have immune system disorder on test results.....?

Possible vasculitis: I would have an ANCA panel checked, especially with you saying you're having hematuria and proteinuria. There are a few conditions we refer to as pulmonary renal syndromes and they are all a type of vasculitis. Some of the names are Wegener's and Goodpasture's. ...Read more

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What does a positive TB test mean?

Chest X ray: It is possible to have active TB with very little symptoms especially early on. However, it is more than likely that you carry the germ for TB in a dormant form, this is called latent tb. No symptoms are expected with latent tb. ...Read more

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How do I know if I have a positive TB test?

If there is a bump: When TB infects the body the infection gets walled off by antibodies. The medical person injects a manufactured antibody under your skin that reacts to the TB antibody. If a bump appears at the injection site after 48 hours it means you have the antibody to TB already in your body and therefore have TB infection. It does not mean that you have active disease or are contagious. ...Read more

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How long should you wait in order to repeat a TB test?

Generally 6 weeks: The need to repeat a TB test generally depends on each individual's previous test results, presence of symptoms & risk factors for exposure to tb. An interval of at least 6 weeks is generally recommended. Talk to an infectious disease specialist for proper interpretation of your testing. ...Read more

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How would I be able to tell if I have a positive TB test?

Size of induration: After the TB test, the skin at the site can develop swelling (induration). The size of this swelling (measured in millimeters by a health care provider within 48-72 hours) determines whether you have a positive result or not. It is important to not measure the area of redness but the actual size of the swelling around the test site. The cut off value for positive test is based on yr risk factors. ...Read more

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Does the TB test commonly appear positive on the first day?

Yes: The TB test can become positive within the first day in someone that has been exposed to TB in the recent past. ...Read more

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I need to get a TB test soon. Is there anything I shouldn't do?

Avoid steroids: Corticosteroid medications can mask skin testing results of the TB screening test ("PPD"). They should not effect the blood test (Quantiferon TB). Steroid medications include pills and inhalers. Topical (applied to skin) should not affect the TB screening test result. ...Read more

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Can weed cause a false positive TB test?

No: Have not heard about that, no relationship., . ...Read more

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What should my skin look like after taking a TB test?

What should my skin look like after taking a TB test?

See below: A positive PPD is determined by the presence of swelling (induration) around the injection site. Little or no swelling indicates a negative test. Reddness is not used to determine a neg or pos test. ...Read more

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Is it safe to go tanning after a TB test?

Is it safe to go tanning after a TB test?

No: Tanning is not safe and is not recommended for anyone. It increases the risk of skin cancer and accelerates facial and body aging. Sunscreen with titanium and zinc can help protect you from uva and uvb rays, but avoiding sun exposure is best. Spray tanning and tanning lotions are a reasonable alternative to achieve a bronzed look, but they may not be safe for pregnant/ lactating women. ...Read more

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If you're pregnant can you get a TB test?

TB test: A TB test is safe to have during pregnancy. It's important to know if you have tb, since you are bringing a new life into the world. You want to protect the baby from getting tb. ...Read more

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People who work at doctors office how often they need to get a TB test?

TB: We get annually at the clinic I work at (unless the person is a PPD converter). ...Read more

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Could I be prevented from going to work until I get my TB test results back?

Depends: If your doctor suspects that you have open pulmonary tuberculosis, you could be prevented from going to work. ...Read more

Dr. John Chiu
2,630 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


Dr. John Chiu
1,043 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