- Cyst is the infective stage to human
- Detected in faeces of infected human
Diagnostic Features
- Size: 50-55 µm (range 45-65 mm)
- Shape: Large, oval or round shaped
- Thick walled
- No cilia and is non motile
- Kidney shaped macronucleus
- Contractile vacuoles visible in the cytoplasm
![](https://parasitology.ou.ac.lk/wp-content/uploads/2021/02/balanti_cyst-x4-150x150.jpg)
![](https://parasitology.ou.ac.lk/wp-content/uploads/2021/02/balanti_cyst-x10-150x150.jpg)
![](https://parasitology.ou.ac.lk/wp-content/uploads/2021/02/balanti_cyst-x40-150x150.jpg)
![](https://parasitology.ou.ac.lk/wp-content/uploads/2021/02/balanti_cyst-x100-150x150.jpg)