title: Neural sarcocystosis in a straw-necked ibis (Carphibis spinicollis) associated with a Sarcocystis neurona-like organism and description of muscular sarcocysts of an unidentified Sarcocystis species.
abstract: A Sarcocystis neurona-like parasite was associated with acute sarcocystosis in the brain of an ibis (Carphibis spinicollis). Numerous schizonts and merozoites were found extravascularly in encephalitic lesions. These schizonts reacted positively with anti-S. neurona and anti-S. falcatula polyclonal antibodies in an immunohistochemical test. Sarcocysts of an unidentified Sarcocystis species were present in the brain, heart, and skeletal muscles. Sarcocysts in skeletal muscles were microscopic, and the sarcocyst wall was up to 3 microm thick. The villar protrusions on the sarcocyst wall were up to 4.5 microm long, constricted at the base, and expanded laterally. Schizonts and sarcocysts distinct from those of S. falcatula.
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Parasite Biology, Epidemiology and Systematics Laboratory, Beltsville, Maryland 20705-2350, USA. jdubey@anri.barc.usda.gov
authors.forename: J R
authors.initials: JR
authors.lastname: Dubey
authors.forename: G C
authors.initials: GC
authors.lastname: Johnson
authors.forename: A
authors.initials: A
authors.lastname: Bermudez
authors.forename: K W
authors.initials: KW
authors.lastname: Suedmeyert
authors.forename: D L
authors.initials: DL
authors.lastname: Fritz
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000469:parasitology*; D001717:Birds / Q000469:parasitology*; D001921:Brain / Q000469:parasitology / Q000473:pathology / Q000648:ultrastructure; D020807:Central Nervous System Parasitic Infections / Q000175:diagnosis / Q000662:veterinary*; D018482:Muscle, Skeletal / Q000469:parasitology / Q000473:pathology / Q000648:ultrastructure; D012523:Sarcocystosis / Q000175:diagnosis / Q000662:veterinary*