EN
A model of an utensil for coproscopic examinations of eggs heavier than water, e.g. eggs of Fasciola hepatica, was developed. It is built out of plexiglass 2 mm thick and is composed of a base with 40 fields, each 8x8 mm in size, a fixed casing 10 mm high and a shelter protecting it from cracking. One square takes in the range of vision of the magnifying glass at 6.3x2.5 magnification. Owing to the marked fields the utensil may be moved and the whole surface of a sediment is examined. Assessment of faeces sediment at a magnification of 6.3x2.5 makes it possible to shorten the time of examination and does not tire eyes. In order to assess the usefulness of the utensil for routine examinations a comparative evaluation of faeces containing 2 eggs of Fasciola hepatica was performed. The first egg in the sample was discovered with in 35 seconds and the time necessary to have a look at the whole sample was over one minute. The utensil can be used in laboratories for ovoscopy and larvoscopy and to assess the intensity of parasite invasion.