What is the indirect and direct Coombs test?

RBC antibodies. These tests are used to detect antibodies against red blood cells (rbcs). The direct coombs test is used in autoimmune hemolytic anemia. That's when your antibodies attack & destroy you own rbcs. The indirect test is used to detect potential transfusion reactions & in pregnancy especially for rh incompatibility when mom is rh- & fetus is rh+. For a more complete explanation see wikipedia.