FIG. 5.

Decreased levels of antibodies in sera from benznidazole-treated mice. Sera of untreated (I) or benznidazole-treated (I + B) T. cruzi-infected and health (N) BALB/c mice were tested by enzyme-linked immunosorbent assay in order to determine the levels of antibodies against T. cruzi antigen (A), TS (B), P₂β (C), the second extracellular loop of the human M₂-muscarinic cardiac receptor (D), and the second extracellular loop of the human β₁-adrenergic cardiac receptor (E). The data represent the means ± standard deviations for 5 to 10 mice for each group. *, P < 0.05 compared to the results for the untreated infected group by one-way analysis of variance followed by Newman-Keuls multiple-comparison test. O.D., optical density.