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Related to Direct antiglobulin test: Coombs test, Indirect Antiglobulin Test


Informal for a debt security issued by the United States government, as opposed to one of its agencies. Perhaps the most prominent example of a direct security is a U.S. Treasury security. Direct securities are considered risk-free because they are guaranteed by the full faith and credit of the United States government.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved

direct (federal) government obligation

A debt that is backed by the full taxing power of the U.S. government. Direct obligations include Treasury bills, Treasury bonds, and U.S. savings bonds. These investments are generally considered to be of the very highest quality. See also federal agency security.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.
References in periodicals archive ?
Relative sensitivity of direct antiglobulin test, antibody's elution and flow cytometry in the serologic diagnosis of immune hemolytic transfusion reactions.
Else et al., "The prognostic significance of a positive direct antiglobulin test in chronic lymphocytic leukemia: a beneficial effect of the combination of fludarabine and cyclophosphamide on the incidence of hemolytic anemia," Blood, vol.
Likewise, Umit et al had opined that a positive direct antiglobulin test was a good predictor for severe ABO haemolytic disease.
Direct Antiglobulin Test Antiglobulin Test 1 Y K1 2 Y Positive for autoantibody 3 N Lea 4 Y History of DAT positivity Fya and autoantibody (autoantibody) 5 Y Positive for passive Negative anti-D 6 Y History of DAT positivity Negative (autoantibody) 7 N Positive for passive Passive anti-D and anti-D cold antibody 8 N Lea 9 Y Lea 10 N C 11 N D, E 12 N Positive for autoantibody Anti-E, DHTR vs DSTR discovered 13 N D 14 N K1 15 N Cold antibody, roleaux 16 Y History of DAT positivity Negative (autoantibody) 17 Y History of DAT positivity Negative (passive anti-D and autoantibody) 18 Y Positive for autoantibody E, C, Fyb, and autoantibody 19 N K1, S 20 Y Leb 21 Y Positive for passive D anti-D 22 Y D 23 N D due to passive anti-D Hemolytic Blood Case Potential?
A detailed clinical and transfusion history was taken using a set performa which included the name, identification number, age, sex, diagnosis, blood group, transfusions done till date of request, transfusions during the present study period, result of serological testing like direct antiglobulin test and auto control, antibody screen tests in the study period with results and antibody identification results.
The initial symptoms and laboratory findings of hemolytic anemia, depressed hemoglobin and haptoglobin concentrations, increased lactate dehydrogenase, increased indirect bilirubin, and an IgG-positive result in a direct antiglobulin test were all consistent with those typically indicative of warm antibody AIHA, although the reticulocytosis often also associated with AIHA was not noted (1).
Serum antibody screens and the direct antiglobulin test were negative.
Results of the patient's direct antiglobulin test (DAT) were strongly positive using broad-spectrum reagents and anti-immunoglobulin G (IgG) and C3 antibodies.

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