Mapei has developed a range of paste products which, because of their nature, are particularly easy to use. The range includes a flexible polymer grout suitable. for coatings on faÃ§ades, including those applied on flexible substrates, and a. highly thixotropic adhesive paste which bonds immediately with no slip.
PPD skin test. The PPD skin test is a method used to diagnose silent (latent) tuberculosis (TB) infection. PPD stands for purified protein derivative. You will need 2 visits to your doctor's office for this test. At the first visit, the health care provider will clean an area of your skin, usually the inside of your forearm. You will get a small shot (injection) that contains PPD. The needle is gently placed under the top layer of skin, causing a bump (welt) to form.
A positive response to a TB skin test does not mean that you have active TB. Rather it means that you have been exposed to TB and need further evaluation. A TB test is performed by injecting a small amount of fluid that contains components of the TB organism under the skin. If a patient has been exposed to TB before or has received the BCG vaccine, the patient will react to the injection by forming a hard, raised area at the injection site.