The reindeer abomasal nematode (Ostertagia gruehneri) is naturally transmitted to sheep when sharing pastures.

摘要: The increasing number of sheep (Ovis aries) in northern Finland, often alternately corralled with winter-fed reindeer (Rangifer tarandus tarandus), creates potential for cross-infection gastrointestinal nematodes. aim this study was to elucidate possibility 43 animals. Eleven and 8 had shared a corral by turns, during winters, summers. Another 12 no known contact sheep. Twelve close other ruminants. Both groups were free-ranging During slaughter September November, 2003, abomasa parts intestines collected. Gastrointestinal nematodes counted identified. species found the following: reindeer, Ostertagia gruehneri/Ostertagia arctica, Mazamastrongylus dagestanica, Nematodirus tarandi, Nematodirella longissimespiculata Bunostomum trigonocephalum; sheep, Teladorsagia circumcincta/Teladorsagia trifurcata, O. gruehneri/O. filicollis N. spathiger. In sharing only abomasal nematode gruehneri, parasite. generation interval gruehneri Finnish appears be shorter than Canadian Arctic caribou, where complete larval inhibition leading one yearly has been reported.