Fig. 2

Degree of Schistosoma infection intensity in the adult male population of Tibati and Wouldé. Light-infection intensity: 1–99 epg; moderate-infection intensity: 100–399 epg; and heavy-infection intensity ≥ 400 epg for S. mansoni and for S. haematobium, light-infection intensity: < 50 eggs/10 mL and heavy-infection intensity: ≥ 50 eggs/10 mL