[Comparison of the effectivity of 2 quantitative ovoscopic technics].

A comparison of efficiency of a quantitative proof of the eggs of gastrointestinal nematodes in the faeces of sheep by methods after Breza and Svarc (1968) and Wetzel (1951) modified for the recalculation of eggs by McMaster's chamber showed a 95 to 99% capture rate of eggs within the limits of reliability. The efficiency of both methods depends on the infection intensity, ovulation activity of the nematodes in the particular season of the year and, last but not least, on the age of the host. More accurate results are obtained in experimental in infections by a known dose of larvae than in natural infections influenced by ecological factors. From the number of eggs it is possible to estimate the intensity of infection in relation to the season of the year, the age of the animal and grazing conditions.