title: The nine-banded armadillo (Dasypus novemcinctus) is an intermediate host for Sarcocystis neurona.
abstract: The nine-banded armadillo (Dasypus novemcinctus) is an intermediate host of at least three species of Sarcocystis, Sarcocystis dasypi, Sarcocystis diminuta, and an unidentified species; however, life cycles of these species have not been determined. Following feeding of armadillo muscles containing sarcocysts to the Virginia opossum (Didelphis virginiana), the opossums shed sporulated Sarcocystis sporocysts in their faeces. Mean dimensions for sporocysts were 11.0x7.5 microm and each contained four sporozoites and a residual body. Sporocysts were identified as Sarcocystis neurona using PCR and DNA sequencing. A 2-month-old foal that was negative for S. neurona antibodies in the CSF was orally inoculated with 5x10(5) sporocysts. At 4 weeks post-infection, the foal had a 'low positive' result by immunoblot for CSF antibodies to S. neurona and by week 6 had a 'strong positive' CSF result and developed an abnormal gait with proprioceptive deficits and ataxia in all four limbs. Based on the results of this study, the nine-banded armadillo is an intermediate host of S. neurona.
authors: Department of Pathobiology, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL32610-0880, USA. cheadlem@mail.vetmed.ufl.edu
authors: M A
authors: MA
authors: Cheadle
authors: S M
authors: SM
authors: Tanhauser
authors: J B
authors: JB
authors: Dame
authors: D C
authors: DC
authors: Sellon
authors: M
authors: M
authors: Hines
authors: P E
authors: PE
authors: Ginn
authors: R J
authors: RJ
authors: MacKay
authors: E C
authors: EC
authors: Greiner
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan / Q000134:cerebrospinal fluid; D001135:Armadillos / Q000469:parasitology*; D016054:DNA, Protozoan / Q000737:chemistry / Q000302:isolation & purification; D005243:Feces / Q000469:parasitology; D006734:Horse Diseases / Q000469:parasitology* / Q000635:transmission; D006736:Horses; D006790:Host-Parasite Interactions / Q000502:physiology; D008297:Male; D008854:Microscopy, Electron / Q000662:veterinary; D018482:Muscle, Skeletal / Q000469:parasitology / Q000648:ultrastructure; D009893:Opossums / Q000469:parasitology*; D016133:Polymerase Chain Reaction / Q000662:veterinary; D012150:Polymorphism, Restriction Fragment Length; D012522:Sarcocystis / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D012523:Sarcocystosis / Q000635:transmission / Q000662:veterinary*; D017422:Sequence Analysis, DNA
chemical_list: D000913:Antibodies, Protozoan; D016054:DNA, Protozoan