title: The contribution to the epidemiology of gastrointestinal nematodes of sheep with special focus on the survival of infective larvae in winter conditions.
abstract: Tracer tests conducted over a 3-year period were aimed at measuring the level and species nematode composition of survival on pastures with a special focus on winter months. The survival of infective larvae in chilly conditions is not significantly affected by Trichostrongylus axei, Trichostrongylus colubriformis, Trichostrongylus vitrinus and Chabertia ovina. On the contrary, the number of Teladorsagia circumcincta and Nematodirus filicollis significantly increased in milder winter conditions. The results confirmed an epidemiological strategy of overwintering in the arrested stage for Teladorsagia circumcincta and Nematodirus filicollis; the epidemiological strategy of genus Trichostrongylus used both strategies-in particular the tolerance of free-living stages to cold conditions. Part of the population overwintered in the arrested stage as well.
authors.affiliation: Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 957, 165 21 Prague 6-Suchdol, Czech Republic.
authors.forename: Katerina
authors.initials: K
authors.lastname: Makovcová
authors.forename: Ivana
authors.initials: I
authors.lastname: Jankovská
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Vadlejch
authors.forename: Iva
authors.initials: I
authors.lastname: Langrová
authors.forename: Pavel
authors.initials: P
authors.lastname: Vejl
authors.forename: Andriy
authors.initials: A
authors.lastname: Lytvynets
mesh_terms: D000818:Animals; D018153:Czech Republic; D041981:Gastrointestinal Tract / Q000469:parasitology*; D007814:Larva / Q000254:growth & development; D012621:Seasons; D012757:Sheep Diseases / Q000453:epidemiology* / Q000469:parasitology*; D034561:Sheep, Domestic / Q000469:parasitology; D017183:Strongylida / Q000254:growth & development* / Q000302:isolation & purification; D017206:Strongylida Infections / Q000469:parasitology / Q000662:veterinary*; D014254:Trichostrongylus / Q000254:growth & development / Q000302:isolation & purification