See below. Swelling at the test site. The amount of swelling needs to be measured, and assessed by a qualified provider or their staff.
Depends. That depends on your age, other health conditions, and whether you recently went from having a negative PPD to a positive one. In some cases, we treat with a 9 month course of isoniazid, or a shorter course of Isoniazid and rifapentine, to eliminate the latent bacteria.
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.
Mycobacteria. Tuberculosis and other members of the same family, some less severe. There are also "positives" that aren't true in duration - like an allergic reaction at the site within minutes of ppd placement.
.? feel. Positive PPD reaction is manifested by skin induration not associated with pain or itching.
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.
POSITIVE PPD. If it is the first time positive reading and it is more than 15mm positive, you need to have xray chest done, if negative you need prophylactic inh prescribed by your doctor for 9 months.
Call your doc. You have not indicated who or where you were tested. If you are indeed positive you need to get in with your primary care doc and proceed with additional testing and treatment.
See image. A reaction of 15 mm or greater in a generally healthy person with a normal immune system without risk factors is considered a positive reaction.
Difficult to spread. Tb is a very slow growing germ that is unlikely to spread unless the person has a persistent cough, bloody sputum or other signs of active disease. Those with asymptomatic conversion of a PPD are unlikely to spread it casually. Intimate contact for extended periods may spread it so households of a positive case are often screened in the process.
Yes. There have nothing to do with each other. The ppd test is for TB and you can get the flu regardless of your ppd status so get that flu shot!
Yes. There is really no reason not to get a flu shot even among egg-allergic patients.
Yes, no problem. In fact, being protected against influenza may be even more important than otherwise, especially is fhere is any chance of active tuberculosis. If in doubt, check with your doctor.