Fig. 1

Two water bodies and two suspected BU-like lesions that were sampled at Edjom. a Nyong river (Nlong). b Fishing activities on the Nyong river. c Suspected BU-lesion (a circular ulcer of the left foot at the granulation phase on an articulation. This is a venous ulcer with a dark background and edema of the foot, found in a 27-year-old fisher. d Suspected BU-lesion (a plate of the left elbow with the onset of ulceration and a fibrinous background, found in a 14-year-old boy). These patients declared to work in close contact with the Nyong river for fishing and agricultural activities