A serological survey of a patient admitted to the Clinic of Infectious Diseases, Far-East State Medical University, for suspected North Asian tick-borne rickettsiosis (NATBR) revealed antibodies in the increasing titers to Ehrlichia phagocytophila and no antibodies to other causative agents of natural and focal infections in the Far East. The disease presented with significant intoxication and maculopapular eruption. This disease differed from the standard NATBR in that there was neither primary affect at the site of pathogen entry, regional lymphadenitis, nor involvement of the liver in the pathological process (elevated levels of AIAT, AsAT, pigment metabolic disturbance), and that there was a steady-state tendency to leukopenia.