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.
1 Agglutination with Polyspecific AHG indicates a positive DAT, due to either IgG antibodies or complement coating the patient's cells. 2  Agglutination with Anti-IgG indicates antibody (immunoglobulin) is coating the cells.  Agglutination with Anti-C3 indicates complement is coating the cells.