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.
The DAT is a 5-10 minute procedure performed by incubating patient red cells with the antiglobulin (Coombs) reagent. A positive DAT due to IgG is seen most frequently in patients with warm autoantibodies. Approximately 1/3 of these patients also have C3 on the red cell membrane.