- Stool smear, wet mount preparation showing Isospora belli.
- Oocysts are elongated ellipsoidal in shape, one sporoblast or two sporocysts appear inside.
- Oocyst wall is thin and colorless, unexperienced microscopist may miss it easily.
Isospora belli oocysts with one sporoblast
Isospora belli oocysts with two sporocysts appear inside
