It comes pre-mixed in 1-gallon pails, so the color and consistency is perfect every time. Coverage with a Â¼ grout line is approximately 50 sq. ft. for a 12 x12 application. See chart for additional information regarding grout coverage per gallon.
In brief: 48 to 72 hours. The actual placement of the TB skin test (PPD) only takes a few seconds and should be painless. However you need to return to the clinic to have the skin test read by someone who knows what they are looking for between 48 and 72 hours later. In brief: 48 to 72 hours.
Mycobacterium tuberculosis â bacteria that cause latent TB infection and TB disease. Negative â usually refers to a test result. If you have a negative TB skin test reaction, you probably do not have TB infection.Positive â usually refers to a test result.If you have a positive TB skin test reaction, you probably have TB infection. Pulmonary TB â TB disease that occurs in the lungs, usually producing a cough that lasts 3 weeks or longer.f you have a negative TB skin test reaction, you probably do not have TB infection. Positive â usually refers to a test result. If you have a positive TB skin test reaction, you probably have TB infection. Pulmonary TB â TB disease that occurs in the lungs, usually producing a cough that lasts 3 weeks or longer.