[Study of feces for parasitic stages]

A modification of faeces or soil (1 kg) examination technique for parasitic eggs and cysts is presented. The method is based on sedimentation (30 min) in a large measuring cylinder combined either with a biological test (hatching miracidia technic) or with a flotation method. For the flotation technique the solution of Kalium iodide (sp. grav. 1,3) is used. The use of kalium iodide is advantageous because the saturated solution reaches over 1,7 sp. gr. at the laboratory temperature.