#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
  supertype:  #blood_test__bloodtest  a serologic analysis of a sample of blood
  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

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