Last Updated: 2019-08-26
Rickettsiosis caused by Rickettsia acarii.
- Especially in New York there were several smaller endemic cases.
- 800 cases were registered by 2010.
- Rickettsia acarii.
- Transmission is by mouse and rat mites. R. acarii belongs to the "Spotted fever group.
- Unspecific early stage (cephalgia, exhaustion).
- In the course of fever, somnolence: Fever, somnolence.
- 3-6 days after onset of fever, appearance of roseoles with partially punctiform haemorrhages on the stem, which spread centrifugally. Palmoplantar involvement.
- Muscle twitching, pressure sensitivity of peripheral nerves, motor restlessness.
- Bronchitis, conjunctivitis, splenomegaly.
- Usually lice (pediculosis corporis) can be detected.
- Facies typhosa: Livid-red face.
- In the area of the inoculation site a partially ulcerating papulovesicle appears.
- Medical history.
- Lice infestation.
- Blood count (leukopenia, eosinophilia, thrombopenia, ESR ↑), liver and kidney values (Transaminasen↑), electrolytes.
- From the 2nd week of the disease Weil-Felix reaction (agglutination test).
- From the 3rd week of illness, complement fixation reaction.
- Indirect immunofluorescence test from the 3rd week of the disease.
Back, forearms, lower legs, ankles.
- Temperatures are declining under antibiotic therapy after 1-2 days.
- Paddock, C.D., et al., Rickettsialpox in New York City: a persistent urban zoonosis. Ann N Y Acad Sci, 2003. 990: p. 36-44.
- Madison, G., et al., Hepatitis in association with rickettsialpox. Vector Borne Zoonotic Dis, 2008. 8(1): p. 111-5.
- Boyd, A.S., Rickettsialpox. Dermatol Clin, 1997. 15(2): p. 313-8.
- Heymann, W.R., Rickettsialpox. Clin Dermatol, 1996. 14(3): p. 279-82.
- Valbuena, G. and D.H. Walker, Infection of the endothelium by members of the order Rickettsiales. Thromb Haemost, 2009. 102(6): p. 1071-9.