#blood_test__bloodtest  a serologic analysis of a sample of blood
  supertype:  biopsy  examination of tissues or liquids from the living body to determine the existence or cause of a disease
  subtype:  agglutination_test__agglutinationtest  a blood test used to identify unknown antigens; blood with the unknown antigen is mixed with a known antibody and whether or not agglutination occurs helps to identify the antigen; used in tissue matching and blood grouping and diagnosis of infections
     subtype:  heterophil_test__heterophiltest  a blood test to detect heterophil antibodies that agglutinate sheep red blood cells; positive result indicates infectious mononucleosis
     subtype:  Widal_test__Widal's_test  a test for detecting typhoid fever and other salmonella infections
  subtype:  complement_fixation_test  a blood test in which a sample of serum is exposed to a particular antigen and complement in order to determine whether or not antibodies to that particular antigen are present; used as a diagnostic test
     subtype:  Wassermann_test__wassermanntest__Wasserman_reaction__Wassermann  a blood test to detect syphilis; a complement fixation test is used to detect antibodies to the syphilis organism treponema; a positive reaction indicates the presence of antibodies and therefore syphilis infection
  subtype:  PSA_blood_test  a blood test that measures levels of a protein called prostate specific antigen that is manufactured exclusively by the prostate gland; men with prostate problems usually have elevated levels of PSA

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