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The direct antiglobulin test (DAT) is used to determine whether red blood cells (RBCs) have been coated in vivo with immunoglobulin, complement, or both. The direct antiglobulin test is sometimes colloquially referred to as the Coombs test, because it is based on a test developed by Coombs, Mourant, and Race.
Similarly, you may ask, what does a positive DAT test indicate?
A positive DAT means that there are antibodies attached to the RBCs. In general, the stronger the DAT reaction (the more positive the test), the greater the amount of antibody bound to the RBCs, but this does not always equate to the severity of symptoms, especially if the RBCs have already been destroyed.
Then, is the DAT test hard?
The test is science-based, and Sul described it as similar in structure to the math and science section of the SAT–except harder. She explained that the main subject areas she studied were general chemistry, organic chemistry, biology, and perceptual ability.
The Dental Admission Test (DAT) consists of multiple-choice items distributed across a battery of four tests: the Survey of the Natural Sciences (Biology, General Chemistry, and Organic Chemistry), Perceptual Ability Test, Reading Comprehension Test, and Quantitative Reasoning Test.