Doctor insights on:
Tb Skin Test Frequency
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
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
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
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. ...Read more
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. ...Read more
Not frequently: Unless you are exposed in your job or it is needed for your job. Some health care workers get it yearly. ...Read more
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
Great: Nothing to worry about.Get a more detailed answer ›
No: Fortunately not or we would not be able to perform this test on more than one occasion. ...Read more
Tuberculin test: If you need both physical examination and a tuberculin test, go to a primary carea provider. ...Read more
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. ...Read more
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.... ...Read more
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
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. ...Read more
Tb test: It takes 48-72 hours to read a TB test ...Read more
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. ...Read more
Blood test: There is both a skin test and a blood test for tb. ...Read more
Different cutoffs: Positive result for TB skin test is based on the size of the swelling (induration) at the site of TB test & additional risk factors that you have for acquiring tb. There are 3 cut offs for determining positive result (5, 10 & 15mm) & each one has different criteria for being used as cutoff for your test. Talk to your doctor to find out whether your test is positive or not based on these factors. ...Read more
Probably OK: Unless it is a big scratch leading to a large hematoma, it is unlikely that it would affect the skin test reading at 48 hrs. ...Read more
True of false: This could be a true or false positive, and your doc should sort that out. People can be exposed to TB in the activities of their daily lives, and pick up a latent TB. In med school it was common for students to convert from - to + over a their time in training. You will need more testing, an may or may not need meds. ...Read more
Need care!: Your TB test has turned positive - this is very significant. The guidelines are very clear what needs to happen now with further diagnostic studies, including chest x-ray, and then treatment. If your primary care doctor is not comfortable caring for TB, see infectious disease or pulmonary specialist ASAP to begin evaluation and care. There are great ones in Columbus area - call for appointment now ...Read more
Can you tell me if a TB skin test came up (borderline) positive, wouldn't it always come up the same?
No: A person can have a false negative test if they are immuno compromised, have poor nutrition etc. 10 to 15% of people with newly diagnosed lung TB come up with a neg PPD initially. A test that is borderline may be positive later. Once you have a + ppd, you normally don't need to have it repeated. ...Read more
Is it possible for a person to have an alleregic reaction to a TB skin test, if so what are the symptoms?
Not aware of any: But with advancing age, the response to the skin test may be falsely negative. There are newer tests available which work by assessing the lymphocytes capacity to respond to antigenic stimulation by a component of the tubercle bacillus, but whether this differs in age groups I do not know. ...Read more
Sure: Cold will not interfere with the TB skin test result. ...Read more
Nothing will happen: Nothing will happen with either of those things. The TB test helps determine if you have ever been exposed to the TB bug & whether your immune system (specifically your t cells) has been primed against this bug. The test is read within 48-72 hours after being given & will help determine if you have been exposed or not. Further testing is required after a positive test. ...Read more
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