[Seasonal rhythm of the discharge of Dictyocaulus viviparus, Varestrongylus sagittatus and Elaphostrongylus cervi larvae from the red deer (Cervus elaphus)].

The discharging of the first larvae of Distyocaulus viviparus, Varestrongylus sagittatus and Elaphostrongylus cervi is regulated by a seasonal rhythm. This rhythm was studied in a deer population of 150 +/- 10 animals over a period of 4 years. The maximum discharges of D. viviparus are in May and June and those of the 2 other species are in the time from February to April. Very good results of treatment were achieved with 3 X 7.5 mg and 5 X 3 mg Fenbendazole/kg live weight against D. viviparus and E. cervi. A dose of 5 X 3 mg Fenbendazole proved to have quite a good effect against V. sagittatus. The most favourable time of treatment is late November or early December.