cells. They multiply in the intestinal epithelium of their arthropod vectors such as lice, fleas,
mites and ticks and are transmitted to human during feeding. They classified into two groups:
spotted fever and typhus group. They cause diseases such as typhus, rickettsialpox,
Boutonneuse fever, African tick bite fever, and Rocky Mountain spotted fever. Ticks play an
important role in the transmission of the Rickettsia. Occurrence of the tick-borne rickettsiosis …