title: Isolation of Sarcocystis speeri Dubey and Lindsay, 1999 parasite from the South American opossum (Didelphis albiventris) from Argentina.
abstract: Sarcocystis sporocysts from the intestines of 2 opossums (Didelphis albiventris) from Argentina were fed to gamma-interferon knockout (KO) and nude mice. Protozoal schizonts were seen in brain, liver, spleen, and adrenal glands of mice examined 33-64 days after feeding sporocysts. Sarcocysts were seen in skeletal muscles of KO mice 34-71 days after feeding sporocysts. Schizonts and sarcocysts were structurally similar to Sarcocystis speeri Dubey and Lindsay, 1999 seen in mice fed sporocysts from the North American opossum Didelphis virginiana from the United States.
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Livestock and Poultry Sciences Institute, Parasite Biology and Epidemiology Laboratory, Beltsville Agricultural Research Center, Maryland 20705-2350, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: L
authors.initials: L
authors.lastname: Venturini
authors.forename: M C
authors.initials: MC
authors.lastname: Venturini
authors.forename: C A
authors.initials: CA
authors.lastname: Speer
mesh_terms: D000818:Animals; D001118:Argentina; D005260:Female; D006736:Horses; D006790:Host-Parasite Interactions; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000635:transmission / Q000662:veterinary*; D007421:Intestine, Small / Q000469:parasitology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008819:Mice, Nude; D018482:Muscle, Skeletal / Q000469:parasitology; D009893:Opossums / Q000469:parasitology*; D012522:Sarcocystis / Q000302:isolation & purification* / Q000502:physiology / Q000648:ultrastructure; D012523:Sarcocystosis / Q000469:parasitology / Q000635:transmission / Q000662:veterinary*