title: [Characterization of areas at parasitic risk for sheep reared by open grazing on the ranges of the Causses. 2. Protostrongylids].
abstract: Two pastures out of three in Causse (Center of France) were studied in June 1981 in order to characterize areas at risk for Protostrongylids (small lung-worms). These pastures were grazed in rotation by a flock of 50 Lacaune ewes. Each pasture was divided into 13 areas on mixed criteria related either to vegetation or use of space by the ewes. The following parameters were measured on each area: density of the intermediate hosts (Molluscs), their rate of infection, fecal biomass, type of vegetation and herbage biomass, rate of utilization by the ewes. The potential infectivity of the areas were related to the percentage of banded Cepaea sp., fecal biomass, percentage of the area covered by shrubs (Buxus sempervirens and Juniperus communis) and by Carex humilis.
mesh_terms: D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D004199:Disease Vectors; D004463:Ecology; D005243:Feces / Q000469:parasitology; D005260:Female; D005602:France; D008974:Mollusca / Q000469:parasitology; D009349:Nematode Infections / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D012306:Risk; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology* / Q000469:parasitology
vernacular_title: Caractérisation de zones à risque parasitaire pour des ovins élevés en liberté sur les parcours des Causses. 2. Protostrongylides.