Figure 2.

Kaplan–Meier plots of the progression of conventional serology in treated subjects with chronic Trypanosoma cruzi infection stratified by age at treatment and country setting, with 95% confidence intervals. Plots show the proportion of treated subjects progressing towards seroreversion according to (1) ELISA, (2) IIF, and (3) IHA tests during the follow-up, stratified by age at treatment (1–19 years vs. >19 years) and country setting (group A: Argentina, Bolivia, Chile and Paraguay vs. group B: Brazil).

ELISA, enzyme-linked immunosorbent assay; IIF, indirect immunofluorescence assay; IHA, indirect hemagglutination assay.