title: Sarcocystosis in mink (Mustela vison).
abstract: This report describes the clinical, microscopic, and ultrastructural findings in mink with muscular sarcocystosis. Three 2-3-mo-old mink were killed because they were ill with signs of progressive neurological disease. One mink had variable numbers of sarcocysts in multiple skeletal muscles. Sarcocysts were up to 300 microm in long and 20 microm wide. Ultrastructurally, the sarcocyst wall had numerous elongated 1.7-2.0-microm x 250-nm villar protrusions (VP). The VP had microtubules and irregularly distanced minute undulations. Both metrocytes and bradyzoites were present in sarcocysts. The mink with sarcocysts in muscles also had nonsuppurative meningoencephalitis and meningomyelitis. Similar brain lesions were found in other 2 mink from the same farm, but sarcocysts were not observed in the skeletal muscle of these animals. This is the first report of muscular sarcocystosis in mink.
authors.affiliation: Animal Health Diagnostic Laboratory, Michigan State University, East Lansing 48824, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Ramos-Vara
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: G L
authors.initials: GL
authors.lastname: Watson
authors.forename: M
authors.initials: M
authors.lastname: Winn-Elliot
authors.forename: J S
authors.initials: JS
authors.lastname: Patterson
authors.forename: B
authors.initials: B
authors.lastname: Yamini
mesh_terms: D000818:Animals; D001921:Brain / Q000469:parasitology / Q000473:pathology / Q000648:ultrastructure; D002465:Cell Movement; D008214:Lymphocytes / Q000473:pathology; D008907:Mink / Q000469:parasitology*; D018482:Muscle, Skeletal / Q000469:parasitology / Q000473:pathology / Q000648:ultrastructure; D012522:Sarcocystis / Q000145:classification / Q000302:isolation & purification* / Q000648:ultrastructure; D012523:Sarcocystosis / Q000469:parasitology* / Q000473:pathology / Q000662:veterinary*