But things get much murkier when it is a task order for a defense customer issued against a civilian IDIQ. There are about a dozen protests pending at GAO right now that fall into that crossover category, where a defense agency used a GSA contract such as Alliant or OASIS to hire a contractor.
purified protein derivative (PPD). [pyoÌoÌâ²rifÄ«d]. a dried form of tuberculin used in testing for past or present infection with tubercle bacilli. This product is usually introduced into the skin during such tests and may produce a tuberculin reaction (wheal) within 48 to 72 hours.
What is a PPD? PPD stands for purified protein derivative, which is the solution used for the test. Alternative names you may hear the test called are tuberculin skin test, TB test and Mantoux test. During the procedure, a small amount of the solution is injected with a needle, right under the skin of the inner forearm.