FIG. 2.

Humoral immune responses to B. burgdorferi lysate and to recombinant spirochetal proteins are shown, determined by ELISA. The cross-hatched areas denote the mean value plus 3 SD for eight representative, healthy control subjects, whose serum samples were included on the same plate. The bar indicates the mean value of patients' responses. The values are greater in convalescent-phase samples than in acute-phase samples, but the differences were statistically significant only with B. burgdorferi lysate (P < 0.001).