S there difference between indirect and direct Coombs test?

Yes. The direct coombs test is typically used to test for autoimmune hemolytic anemia, a disorder involving destruction of red blood cells. It determines whether or not antibodies are present on the surface of the patient's rbcs. The indirect coombs test is typically used to test for blood type compatibility prior to a transfusion, and detects the presence of antibodies in the serum of the patient.