title: Isolation of Toxoplasma gondii from a naturally infected beef cow.
abstract: Toxoplasma gondii was isolated from the intestinal wall of an adult shorthorn cow. The cow had an antibody titer of 1:1,600 in the T. gondii agglutination test using formalin-fixed whole tachyzoites. The strain of the parasite designated CT-1 was lethal to mice. This is the first report of the recovery of viable T. gondii from a naturally infected cow in the United States.
authors.affiliation: Zoonotic Diseases Laboratory, USDA, Beltsville, Maryland 20705-2350.
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D002415:Cats; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary; D007422:Intestines / Q000469:parasitology*; D051379:Mice; D014122:Toxoplasma / Q000254:growth & development / Q000276:immunology / Q000302:isolation & purification* / Q000472:pathogenicity; D014124:Toxoplasmosis, Animal / Q000469:parasitology*
chemical_list: D000913:Antibodies, Protozoan