Toxoplasma-like sporozoa in an aborted equine fetus.
Multifocal areas of necrosis and infiltrations of mononuclear cells were seen in lung specimens of an equine fetus aborted 2 months before term. Extracellular and intracellular protozoa were seen in the alveolar tissue. Individual organisms were 4 microns by 2.5 microns, and cyst-like structures were 25 microns by 18 microns. Organisms did not stain with periodic acid-Schiff or by use of the immunoperoxidase and peroxidase-antiperoxidase method for Toxoplasma gondii. Twelve days after abortion, the mare had serum antibody titer of less than 1:10 against T gondii.
D000034:Abortion, Veterinary / Q000469:parasitology* / Q000473:pathology; D000818:Animals; D016782:Apicomplexa; D005260:Female; D005333:Fetus / Q000469:parasitology*; D006734:Horse Diseases / Q000469:parasitology* / Q000473:pathology; D006736:Horses; D008168:Lung / Q000469:parasitology / Q000473:pathology; D011247:Pregnancy; D011528:Protozoan Infections / Q000473:pathology; D011529:Protozoan Infections, Animal