title: Muscular Sarcocystis infection in a bear (Ursus americanus).
abstract: Sarcocysts of an unidentified Sarcocystis species were found in sections of skeletal muscles of a black bear (Ursus americanus) from North Carolina. Two sarcocysts in a section measured 45 x 37.5 microm and 67.5 x 50 microm and had a thin (<2 microm) sarcocyst wall. The villar protrusions on the cyst wall were up to 2 microm long and up to 0.7 microm wide. The bradyzoites were approximately 6 X 2.5 microm in size. This is the first report of muscular Sarcocystis in a bear.
authors.affiliation: Parasite Biology and Epidemiology Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland 20705-2350, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: M J
authors.initials: MJ
authors.lastname: Topper
authors.forename: F B
authors.initials: FB
authors.lastname: Nutter
mesh_terms: D000818:Animals; D008854:Microscopy, Electron / Q000662:veterinary; D018482:Muscle, Skeletal / Q000469:parasitology*; D012522:Sarcocystis / Q000302:isolation & purification* / Q000648:ultrastructure; D012523:Sarcocystosis / Q000469:parasitology / Q000662:veterinary*; D001503:Ursidae / Q000469:parasitology*