title: The distribution of the infective larvae of sheep gastro-intestinal nematodes in soil and on herbage and the vertical migration of Trichostrongylus vitrinus larvae through the soil.
abstract: From May 1982 until September 1983 samples of soil and herbage were collected from a paddock grazed from May to October 1982, and for two short periods between May and July 1983, by sheep infected with gastro-intestinal nematodes. Few infective larvae were recovered from the soil although appreciable numbers of larvae were recovered from the herbage. Infective larvae of Trichostrongylus vitrinus in faeces buried in the soil of grass plots, at a depth of 10 cm, each month from April 1982 until March 1983, migrated on to the herbage at all times of the year, few remaining in the soil. The significance of the soil as a reservoir of infective larvae is discussed.
mesh_terms: D000818:Animals; D004064:Digestive System / Q000469:parasitology*; D007814:Larva; D006109:Poaceae; D012756:Sheep / Q000469:parasitology*; D012987:Soil; D014251:Trichostrongyloidea / Q000302:isolation & purification*
chemical_list: D012987:Soil