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Doctor insights on: What Does A Positive Tb Skin Test Look Like

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Dr. John Chiu
Board Certified, Allergy and Immunology
52 years in practice
21M people helped
1

1
Normal chest X-ray & abdominal/pelivic CT scan, but positive TB skin test? I have low grade fevers, extreme fatigue & swollen lymph nodes. Tb?

Dr. John Chiu
Board Certified, Allergy and Immunology
52 years in practice
21M people helped
Normal chest X-ray & abdominal/pelivic CT scan, but positive TB skin test? I have low grade fevers, extreme fatigue & swollen lymph nodes. Tb?

Unlikely TB: It is unusual to have TB with a normal chest x-ray. You need to see your doctor get a work-up ASAP. ...Read more

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Dr. Dennis Higginbotham
Board Certified
25 years in practice
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Dr. Dennis Higginbotham
Board Certified
25 years in practice
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Dr. Scott Lindquist
553 doctors shared insights

Mycobacterium Tuberculosis Infection (Definition)

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Dr. Andrew Turrisi
Board Certified, Radiation Oncology
42 years in practice
10M people helped
2

2
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 ?

Dr. Andrew Turrisi
Board Certified, Radiation Oncology
42 years in practice
10M people helped
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. ...Read more

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Dr. Dennis Higginbotham
Board Certified
25 years in practice
49M people helped
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Dr. Dennis Higginbotham
Board Certified
25 years in practice
49M people helped
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Dr. Gaston Moran Celayes
Board Certified, Internal Medicine
21 years in practice
283K people helped
3

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

Dr. Gaston Moran Celayes
Board Certified, Internal Medicine
21 years in practice
283K people helped
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 (+). ...Read more

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Dr. Nela Cordero
Board Certified, Pediatrics
49 years in practice
8M people helped
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4
Could a positive TB skin test mean you always have tb?

Dr. Nela Cordero
Board Certified, Pediatrics
49 years in practice
8M people helped
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. ...Read more

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Dr. Dennis Higginbotham
Board Certified
25 years in practice
49M people helped
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Dr. Oscar Novick
Board Certified, Pediatrics
53 years in practice
54M people helped
5

5
If I had a positive TB skin test but a negative xray do I need medication? My doctor didn't say I did

Dr. Oscar Novick
Board Certified, Pediatrics
53 years in practice
54M people helped

Positive PPD: If you have a positive tuberculin test and a negative chest xray many doctors will oder a sputum culture. If you have a positive sputum treatment is indicated. However, many doctors will treat prophylactically with isoniazid for protection ...Read more

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Dr. Oscar Novick
Board Certified, Pediatrics
53 years in practice
54M people helped
6

6
Is it okay to donate blood if i had a positive TB skin test but negative chest x-ray?

Dr. Oscar Novick
Board Certified, Pediatrics
53 years in practice
54M people helped
Is it okay to donate blood if i had a positive TB skin test but negative chest x-ray?

Positive skin test: You can donate blood as long as you dont have active tb. ...Read more

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Dr. Harris Lilienfeld
Board Certified, Pediatrics
48 years in practice
118K people helped
7

7
How do doctors differentiate between a positive TB skin test due to BCG vaccine vs latent TB infection?

Dr. Harris Lilienfeld
Board Certified, Pediatrics
48 years in practice
118K people helped
How do doctors differentiate between a positive TB skin test due to BCG vaccine vs latent TB infection?

Blood test: There is a blood test which can help tell the difference. ...Read more

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Dr. Cornelia Franz
Board Certified, Pediatrics
8M people helped
8

8
If you have a TB skin test and it turns a little red and looks like a bug bite is this a positive or negative test?

Dr. Cornelia Franz
Board Certified, Pediatrics
8M people helped

Depends : On the size of the swelling or induration. This is why they need to be seen and read 48 hours after being placed. ...Read more

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Dr. James Ferguson
Board Certified, Pediatrics
41 years in practice
145M people helped
9

9
What to do if I have a positive on my TB skin test?

Dr. James Ferguson
Board Certified, Pediatrics
41 years in practice
145M people helped
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. ...Read more

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Dr. Lois Freisleben-Cook
Board Certified, Developmental and Behavioral Pediatrics
36 years in practice
3M people helped
10

10
What does it mean if I have a negative TB skin test yet a positive blood one?

Dr. Lois Freisleben-Cook
Board Certified, Developmental and Behavioral Pediatrics
36 years in practice
3M people helped
What does it mean if I have a negative TB skin test yet a positive blood one?

IMMUNE PROBLEM: Both tests detect prior exposure to TB. A situation of diminished immune function, called anergy, can make the skin test appear negative. If you have a positive blood test you will need to have a CXR to exclude active infection and may need prophylaxis . ...Read more

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Dr. Dennis Higginbotham
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25 years in practice
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