Comparison of serological response to nifurtimox treatment measured by ELISA F29 and by conventional serology
At the 4-year follow-up, the number of patients with seronegative ELISA F29 values was higher in both treatment groups compared with the number of patients with seronegative values measured by either recombinant ELISA, total purified antigen ELISA, or IHA (Number of patients with nonreactive values measured by ELISA F29, recombinant ELISA, total purified antigen ELISA, and IHA in the 60-day (A) and 30-day (B) nifurtimox treatment groups over the study period (FAS).