Doctor insights on:
Ppd Test Negative Result
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
I got a PPD with a physical last year and don't want to get another test this year. How long are those results good for?
1 year: They should be given yearly.Get a more detailed answer ›
Not necessary: A negative PPD simply means you don't have a lump at the site of the PPD injection 48-72 prior. This means the skin appears normal. If there is a raised bump at the site, then depending on your particular risk factors or history, you may be positive. The next step would be a chest x-ray. But, if no bump, then negative. ...Read more
Had a PPD skin test and the result is 10 mm the reference says 5 to 10 is borderline. and i don't get it what they mean and what to do next ?
Positive PPD: A +ve PPD is usually evaluated with a plain Chest Xray. If that is normal, and if it appears that the positive PPD is new (if there is a history of previous negative tests) then a course of treatment with anti-tuberculosis antibiotics is usually given, this prevents you from getting sick with TB. Sometimes a borderline (intermediate) test result can be from a prior BCG vaccination. ...Read more
Ppd skin test, negative, no reaction and swelling (72 hrs). The test was taken in last tuesday morning, 9am, now it gets swelling and itch. Positive?
Delayed onset ppd: This could represent a positive reaction. Their is a besst confirmatory test called a quantiferon-gold test which is a gamma-interferon release assay for tb. It has some limitations but if positive is very accurate for diagnosis, ask an infectious disease specialist about this if your pcp does not know about this test. ...Read more
What if a nurse alters the results of your PPD skin test to say zero reaction when there is a reaction? Will you die if you have untreated TB for 15 y
Maybe nothing but...:
First, this sounds very unusual. Tell your doctor. Ask it to be repeated & read by the doc or a different nurse.
A positive PPD generally indicates you've been exposed to TB but it's usually not an active infection. Because it does become active in about 10% of people,treatment with Isoniazide is advised,but if over 35 usually is not treated due to risk of side effects: http://tinyurl.com/kspxlua ...Read more
Just had a ppd test done is it normal after my test results came back I have a rash like bump on my arm?
Positive: That could be a positive test. Otherwise that will go away in a few days ...Read more
Xray shown tb positve. ppd test positive but sputum negative. Since I show no symptoms like fever, cough, night sweats etc., is it latent or active?
As it says: In some people with previous exposure to tb, especially remotely, an imitial TB skin test (tst) will be negative but a repeat, say 2 weeks later, can be positive. It is sort of like waking up the immune recognition of the bug. But, it is not at all clear that those who are only positive on the two-step tst are at risk for reactivation later as those with a 1-step positive tst. ...Read more
Depends: It usually only takes a few days but severe reactions can take 1-2 weeks and can even leave a scar if the reaction was a blistering one. ...Read more
Yes: The reaction the next time around can be more prominent leading to significant pain and discomfort and, potentially, a scar. Once a person has had a positive PPD skin test, they should not have the test repeated. ...Read more
Ppd test and after 3 days, the induration measures 8mm. do you think an induration of 8mm is positive?
depends. Please check the reference to see which factors apply to you. However - who checked the induration? I have always used the ballpoint pen method to determine parameters accurately. Feeling just with fingers alone may be inaccurate.
REF: https://www.cdc.gov/tb/publications/factsheets/testing/skintesting.htm ...Read more
Firmness: The diameter of the circle of hardened skin at the site of the PPD is measured, and depending upon who you are, what underlying diseases you may have, what medications you are taking, it is read in 48 hrs. Do not measure the area of redness, only the area of firmness (induration). Otherwise there are seldom other symptoms. ...Read more
Depends: Who are you, what underlying conditions do you have. Generally, for a normal non-hiv adult, a one centimeter area of induration (hardness of the underlying tissues) is considered positive. Do not count areas of redness. If positive it means you have living mycobacteria somewhere in your body, although these can remain inactive the rest of your life. ...Read more
I had a PPD done last month and was neg, then i had another one done 2days ago & got it read today & was neg but started itching, should I worry?
No: You are negative. Consider it like a bug bite. Sometimes it will itch. ...Read more
M. TB infection: To determine whether you're infected with mycobacterium tuberculosis, the bacterium that causes tb. A positive test doesn't necessarily mean you have active TB (the disease). You may be latently infected, which means the bacteria are present in the body, but are not making you sick. ...Read more