Fig. 2.

8–9 An immature female O. volvulus produces not yet oocytes (arrows) and the gut contains no pigment (arrowhead). Young worms from a 4-year-old child in Liberia. HE, scale bar = 50 µm. 10 This immature worm without oocytes and a light gut (arrowhead) from an untreated patient contains Wolbachia (arrow) in the hypodermis, that are red labelled by anti-hsp60 serum. Scale bar = 10 µm