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Back to Infectious Diseases
Rickettsial infection
Rickettsia are small intracellular bacteria that inhabit arthropods.
There are 5 types of rickettsial diseases:
- Typhus.
- Scrub typhus.
- Rocky mountain spotted fever.
- Trench fever.
- Q fever.
The main pathology is vasculitis (inflammation of the blood vessels).
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Typhus
The clinical picture includes the following symptoms:
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Orbital pain & headache & meningeo-encephalitis.
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Rash (measles like).
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Renal failure.
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Other organs: hepato-splenomegaly, lymph node enlargement,
pneumonia.
Diagnosed by Weil-Felix test.
Treatment: Tetracycline.
All other types similar to above.
Q-fever:
Caused by the organism Coxiella burnetti, no vector
is needed.
Clinical picture: Petechial rash, atypical
pneumonia, hepatitis.
Treatment: Tetracycline.
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