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Febrile/cold agglutinins

Alternative names:

cold agglutinins; Weil-Felix reaction; Widal's test

Normal values:

  • febrile (warm) agglutinins: no agglutination in titers at or below 1:80
  • cold agglutinins: no agglutination in titers at or below 1:16

What abnormal results mean:

The presence of febrile agglutinins may occur after:

The presence of cold agglutinins may occur after:


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