Last Updated: 2023-07-07
Author(s): Anzengruber F., Navarini A.
Rickettsiosis caused by Rickettsia acarii.
- In New York in particular, several smaller endemics appeared.
- 800 cases had been registered by 2010.
- Rickettsia acarii.
- Transmission occurs through mouse and rat mites. R. acarii belongs to the "spotted fever group".
- Unspecific early stage (cephalgia, exhaustion).
- In the course: Fever, somnolence.
- 3rd-6th days after onset of fever Appearance of roseolae with partly punctate haemorrhages on the trunk, which spread centrifugally. Palmoplantar involvement.
- Muscle twitching, tenderness of peripheral nerves, motor restlessness.
- Bronchitis, conjunctivitis, splenomegaly.
- Mostly lice can be detected (pediculosis corporis).
- Facies typhosa: Livid-reddish face.
- Apartially later ulcerating papulovesicles are seen in the area of the inoculation site.
- Lice infestation.
- BB (leukopenia, eosinophilia, thrombocytopenia, ESR ↑), liver and kidney values (transaminases↑), electrolytes.
- From 2. 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.
- Temperatures are regressive under antibiotic therapy after 1-2 days.
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