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. 2016 Jun 24;54(7):1755–1765. doi: 10.1128/JCM.02784-15

TABLE 1.

Summary of sera used in this study

Group Description of sera No. of patients or donors (no. of samples)
1 Spanish samples from 2 time points, seronegative (titer < 64) to seropositive (titer ≥ 64) 40 patients (80)
2 Spanish samples from 2 time points, seropositive (titer ≥ 64) to seropositive (≥2-fold increase in titer) 41 patients (82)
3 Spanish samples from 2 time points, seropositive (titer ≥ 64) to seropositive (but <2-fold increase in titer) 18 patients (36)
4 Spanish samples from 2 time points, seronegative (titer = 0) to seronegative (titer = 0) 5 patients (10)
5 Samples from healthy Spanish blood donors 23 donors (23)
6 Spanish samples from a single time point, confirmation of tularemia by bacterial culture 5 patients (5)
7 Samples from healthy adult controls from Orange County, CA (an area of nonendemicity), with no known history of tularemia 12 donors (12)