The median age of patients was 57.2 years (range, 23-88) and the male-to-female ratio was 1 to 2.27; 219 patients (92.02%) were farmers and 19 (7.98%) were workers or students. Among patients, 52 (21.85%) reported a tick bite within 2 weeks (5-14 days) before the onset of clinical manifestations; the remaining patients did not recall receiving a tick bite.