Trematode (fluke) eggs in unstained wet mounts from stool concentrates (x400). (A) Fasciola hepatica egg with a small operculum (arrow). (B) Clonorchis sinensis egg with prominent opercular shoulders (arrows) and an abopercular knob (arrowhead). (C) Paragonimus spp. egg with prominent opercular shoulders (arrows). (D) Schistosoma mansoni egg with a prominent lateral spine. (E) Schistosoma japonicum egg with a rudimentary spine (arrow); Schistosoma mekongi eggs have a similar appearance. (F) Schistosoma haematobium egg with a terminal spine; Schistosoma intercalatum and Schistosoma guineensis eggs have a similar appearance but are found in stool.
👉Source: Parasitology section from Nader Rifai - Tietz Textbook of Laboratory Medicine, 7th Edition, 2023
