5–10 g feces are mixed with 100 ml tap water (for Schistosoma-suspected feces use a physiological saline, which avoids hatching of miracidium larvae).
Larger particles are extracted by sieving the fluid.
The remnant solution is filled into a glass cylinder and left to settle for about 30 min.
Afterward, the supernatant fluid is slowly decanted and filled up with fresh water respectively saline.
This process is repeated until the supernatant fluid appears widely clear.