Fig. 1.

Effect of metal chelators on the viability of T. cruzi Dm28c epimastigotes. Parasites (2 × 10⁷ cells) were cultured for 1 h in the presence or absence of different concentration of either EDTA, EGTA or phenanthroline (0–100 µm). The results correspond to the mean ± s.e.m. of three independent experiments performed in triplicate. An asterisk denotes values significantly different from control (untreated cells) using Student's t test (*P < 0.05).