Background: Rickettsial infections are the most covert re-emerging infections in present times. They are incapacitating and notoriously difficult to diagnose, Weil-Felix (WF) test is classic serological test which is widely available but not widely acceptable because of its low sensitivity and specificity. Present study was aimed to study of usefulness of Weil-Felix test as a simple diagnostic tool for diagnosis of rickettsial fever.