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Doctor insights on: Tb Skin Test Documentation Form

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Dr. Scott Lindquist
609 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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Tb I had my skin test - redness 40 mm I will do the chest xray tomorrow! But am I contagious? What are the side effects of the treatment for TB?

Tb I had my skin test - redness 40 mm I will do the chest xray tomorrow! But am I contagious? What are the side effects of the treatment for TB?

If you are: Coughing, you are able to spread the disease. They may try to culture to see for check for variants. Standard drugs are inh/ethambutol. Duration of therapy is long. Side effects not too troubling.

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Can induration on TB skin test be deep?

Can induration on TB skin test be deep?

No: Induration produced by TB skin test is a raised bump.

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Can a TB skin test be read 24 hours later?

No: It is recommended to wait for at least 48 hours before interpreting the size of the swelling arising at the site of the TB test. This is because the swelling continues to increase for the first 48 hours & that is how this test has been standardized. Please make sure that you do not get your test done on a thursday, so the 48 hours time point won't come over a weekend.

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Can I take a shower while doing a TB skin test?

Can I take a shower while doing a TB skin test?

Yes: Your normal bathing habits will not have any effect on the test & your friends will appreciate it.

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After how many days does a TB skin test disappear?

After how many days does a TB skin test disappear?

3-5 days: The peak reaction usually occurs in the first 2-3 days. Most will resolve within 5 days. This can vary depending on the size of the initial reaction.

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How frequently should I get two-steps TB skin test?

Not frequently: Unless you are exposed in your job or it is needed for your job. Some health care workers get it yearly.

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What to do if I have a positive on my TB skin test?

Seek out information: Most will be followed first with a chest x-ray looking for active pulmonary disease. If negative, you are likely started on one TB drug, depending on your local as treatment for latent (quiet) tb. If you are found to have active tb, you are likely started on a 4 drug program that lasts for up to a year to knock it out. Get with your doc to see.

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Can a person acquire an immunity to the TB skin test?

Can a person acquire an immunity to the TB skin test?

No: Fortunately not or we would not be able to perform this test on more than one occasion.

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Could a positive TB skin test mean you always have tb?

Could a positive TB skin test mean you always have tb?

POSITIVE PPD: NO. Sometimes it is due to immunization given before. Take a chest x-Ray to find any lesion in the lungs.

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Where should I go to get a TB skin test and a physical?

Tuberculin test: If you need both physical examination and a tuberculin test, go to a primary carea provider.

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If my Tb skin test came back positive, should I be worried?

If my Tb skin test came back positive, should I be worried?

Positive PPD: A positive TB skin test should be followed up with a chest xray. If both are positive for findings, one should be treated and followed by an infectious disease specialist and take medications. False positive skin tests can occur if previously vaccinated against TBor infected with TB-like organisms. Improper technique or interpretation of reaction are other causes of false positives.

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Should I concerned that my TB skin test came back positive?

Not really: It does mean your have been exposed and will need treatment to prevent it from worsening TB is a very slow growing germ... I would also suggest consulting a chinese medicine practitioner as many herbs are very helpful in helping the body heal itself....

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If I have a positive TB skin test, does that mean I have tb?

Not necessarily: (+) PPD means that you have been exposed to the TB agent. It doesn't say when. So if you had the TB in the past, it still will be (+) because your body "remembers" from the previous exposure. The greatest risk is if the TB agents are latent in your body, that's why everyone with a (+) PPD will have either a complete treatment with 4 medications or a mild one with only one. Your PPD will remain (+).

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Can a TB skin test be positive if person had TB in the past?

Can a TB skin test be positive if person had TB in the past?

Yes: Exception will be the ones who had a latent TB and received a prophylactic inh treatment for 9 months. Their reaction to tuberculin test can become negative.

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What is a TB skin test and what are the procedures (injection)?

Skin test: It is a liquid (purified protein derivative) that is injected under the skin on the forearm (the ventral side or underside of the forearm) as a bleb that goes away. It tests to see if you were exposed to tb. When it is positive there is an indurated (raised and red) reaction bigger than a dime. It has to be read 2 days after it is done.

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Could you advise what alternatives are there to the TB skin test?

Blood test: There is both a skin test and a blood test for tb.

Dr. Klaus d Lessnau
1,207 Doctors shared insights

Tuberculosis (Definition)

A potentially serious infectious bacterial disease that ...Read more