TABLE 1.

Patients and serum samples evaluated in this study

Patient group	No. of patients	No. of serum samples	No. of males/no. of females	Sex ratio	Median age (range [yrs])	No. of positive serum samples/no. tested for MAT and/or IFA (%)
Positive F. tularensis culture	26	37	21/5	4.2	64 (8–95)	17/26 (65.4)
Seroconversion or ≥4-fold increase in antibody titers	18	41	11/7	1.57	51 (25–76)	18/18 (100)
Positive F. tularensis PCR test	7	15	5/2	2	46 (17–87)	7/7 (100)
Probable tularemia cases	23	29	13/10	1.3	50 (17–84)	23/23 (100)
Negative controls	134	134	74/60	1.23	40 (5–82)	5/134 (3.7)
Total	208	256	124/84	1.47	45 (5–95)	69/208 (33.2)