Rocky Mountain spotted fever
Last Updated: 2023-07-07
Author(s): Anzengruber F., Navarini A.
American rock mountain fever, new world tick-bite fever.
Rickettsiosis caused by Rickettsia rickettsii.
- Widespread worldwide.
- Mostly in the Americas (especially during the spring or summer months).
- Mostly affecting children between 4-10 yrs.
- Pathogen: Rickettsia rickettsii, Rickettsia rickettsii is transmitted by tick bites.
- Incubation period: 2-14 days.
- At the site of inoculation, a partly ulcerated, possibly crusted papule appears.
- Maculopapular exanthema (initially on wrists and ankles).
- Nosebleed, fever, splenohepatomegaly.
- There may be involvement of kidney, liver and CNS.
- Travel history.
- Lice infestation.
- BB, liver and kidney values, electrolytes.
- 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.
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