Last Updated: 2023-07-07

Author(s): Anzengruber F., Navarini A.

ICD11: -

  • Diseases caused by rickettsial infections
  • Rickettsiae are pleomorphic, bacteria-like cocci

  • Transmission occurs through ticks, mites, lice and fleas. The pathogens can also be found in animal faeces
  • Incubation period: 1-2 weeks

  • Initially, there may be a primary lesion (eschar) and concomitant lymphadenitis
  • Locoregional lymph node adenopathy
  • Febrile temperatures
  • Maculopapular exanthema
  • Myalgias and arthralgias
  • Thromboses and also petechiae

  • Anamnesis
  • Clinic
  • Lice infestation
  • BB (leucopenia, eosinophilia), liver and kidney values, electrolytes
  • Serology (takes 2 weeks- start therapy ex juvantibus)
  • From the 2nd week of illness Weil-Felix reaction (agglutination test)
  • From the 3rd week of illness Complement fixation reaction
  • From the 3rd week of illness indirect immunofluorescence test

  • Gastrointestinal bleeding
  • Nephritis
  • Encephalitis
  • Gangrene
  • Myocarditis
  • Hemorrhages