Figure 2. Positivity rate for S. mansoni according to the TF-Test® in relation to worm burden obtained by the Kato-Katz technique, Maxakali indigenous people, 2014-2015. Low: 1 – 99 epg; Medium: 100 – 399 epg; High: 400 – 999 epg; Very high: ≥1000 epg. (WHO, 2002).