title: [Characteristics of Ostertagia sp. populations in naturally infested sheep in the region of Moulay-Bouazza (Morocco)].
abstract: Sixty-six abomasa of ewes were collected monthly at the slaughter-house of Moulay-Bouazza (Morocco) during two years. The characteristics of the population of Ostertagia (mostly O. circumcincta) were studied: number of eggs per female, vulvar polymorphism, length, sex-ratio and size of the worm-burden. These parameters were interrelated and could account for the seasonal variations of the number of eggs per female.
mesh_terms: D000018:Abomasum / Q000469:parasitology; D000818:Animals; D005260:Female; D005298:Fertility; D008297:Male; D009018:Morocco; D010029:Ostertagiasis; D011156:Population Density; D012621:Seasons; D012744:Sex Ratio; D012756:Sheep / Q000469:parasitology*; D014251:Trichostrongyloidea / Q000033:anatomy & histology / Q000502:physiology*
vernacular_title: Caractéristiques des populations de Ostertagia sp. chez les ovins naturellement infestés de la région de Moulay-Bouazza (Maroc).