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A one-step Du test in microplates.
K M Epley1, M L Severns, L M Kline
1American Red Cross, Biomedical Research and Development Laboratories, Rockville, Maryland.
Transfusion
|May 1, 1988
Summary
A novel one-step Du test offers a streamlined approach to blood typing in automated systems. While visually interpreted, it shows high sensitivity and specificity comparable to the standard antiglobulin test.
Area of Science:
- Transfusion Medicine
- Immunology
- Clinical Pathology
Background:
- The standard antiglobulin test for Du antigen detection involves multiple steps, increasing processing time and potential for error.
- Automated microplate systems offer efficiency in blood grouping but require optimized protocols for accurate antigen detection.
Purpose of the Study:
- To develop and evaluate a simplified, one-step Du test suitable for automated microplate systems.
- To assess the performance of this new Du test compared to the conventional antiglobulin test.
Main Methods:
- A one-step Du test was developed using anti-D potentiated with 0.6% dextran in an automated microplate system.
- Reactions were evaluated through both visual interpretation and classification by an automated microplate ABO/Rh system.
Main Results:
- Visual interpretation of the one-step Du test demonstrated sensitivity and specificity close to the antiglobulin test, though reagent-dependent.
- Classification by the automated microplate system yielded lower sensitivity and specificity than the antiglobulin test, but may suffice for some applications.
Conclusions:
- The one-step Du test is a viable, streamlined alternative for Du antigen detection in automated blood grouping.
- Visual interpretation offers superior performance compared to automated classification in this specific setup, highlighting the need for further optimization of automated systems.