What are common infectious inflammatory causes of fever of unknown origin (FUO)?

Updated: Mar 01, 2018
  • Author: Sandra G Gompf, MD, FACP, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

The most common infectious causes of FUO include the following:

  • Tuberculosis (TB)
  • Q fever (parturient animals)
  • Brucellosis (hooved mammals, raw dairy)

Less-common infectious causes of FUO include the following:

  • HIV infection
  • Abdominopelvic abscesses
  • Cat scratch disease (CSD)
  • Epstein-Barr virus (EBV) infection
  • Cytomegalovirus (CMV) infection
  • Enteric (typhoid) fever
  • Toxoplasmosis
  • Extrapulmonary TB

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