Rickettsiae

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All are obligate IC .. need CoA + NAD

All are transmitted by Arthropod to cause TRIAD of headache, fever, rash EXCEPT Coxiella Buernetti by aerosol to cause pneumonia.

ttt. Doxycycline

Rickettsia on wRists

Typhus on Trunk

Q fever = Coxiella burnetti

1. no rash

2. no vector

3. -ve Weil-felix rxn.

4. survive outside for long time

5. not called Rickettsia!

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